sahara desert shrinking

The study was published online March 29, 2018, in the Journal of Climate. The Sahara Is Growing (Even Though It’s Wetter & … So what would happen if it rained across the entire Sahara ... Contents In recent decades, the Sahel region, south of the Sahara Desert, has experienced a significant wettening and re-greening after the dry decades of the 1970s and 1980s. Sahara THE SAHEL IS GREENING Sahara is actually shrinking, with vegetation arising on land where there was nothing but sand and rocks before. The Sahara desert Is Growing (Even Though Amazon Charts October 1, 2009. A cold desert will have very few streams or ponds, and very few plants.Tundras are usually covered in plants, but no trees because of the cold or because the permafrost doesn't let them put down roots. Measuring 5.5 million square miles, it is the largest desert in the world. According to Wikipedia, the Sahara covers a vast area of some 9.2 million square kilometers. Desert conditions occur in northern Africa, especially in the Sahara and the Sahel. Since 1902, the Sahara Desert has grown 10 percent, advancing as much as 500 miles northward over the winter months in some spots. The Kalahari stretches across Botswana, Namibia, and South Africa. — Nick Fraser, Journal Development Manager, Frontiers in Earth Sciences. This desert-shrinking trend is supported by climate models, which predict a return to conditions that turned the Sahara into a lush savanna some 12,000 years ago. The number of giraffes in the wild is shrinking as their habitats shrink. Welcome to BBC Earth, a place to explore the natural world through awe-inspiring documentaries, podcasts, stories and more. The study was published online March 29, 2018, in the Journal of Climate. In the late 19th and 20th centuries herds of 20 to 30 animals were recorded, now on average herd sizes contain fewer than six individuals. “The people who move to the West today need to realize they’re moving into a desert,” Mulroy said. The Sahara has a number of distinct physical features, including ergs, regs, hamadas, and oases. Sahara Desert. In the diplomatic arena though, everyone will have a different way of dealing with such a threat. Not all creatures shy away from the sunlight. A shrinking oasis in the Sahara Desert. Now, that same process is happening in reverse. The desert is subject to constant change. It is the largest reforestation project ever undertaken and until recently I’d not appreciated the brilliance of the … About BRK. Those magnificent palm groves are the blood and bone of the desert; life in the Sahara would be unthinkable without them. Eight percent of that translates into more than 700,000 square kilometers. Bark River effectively uses a variety of new "super steels," and many of their knives still employ A-2 carbon tool steel as well. These knives have gained favor among outdoorsmen worldwide for their superior edge-holding, perfect geometry and top-performing … Eight percent of that translates into more than 700,000 square kilometers. km), the Great Basin is one of the “big four” deserts in North America. Sometime between 11,000 and 5,000 years ago, after the last ice age ended, the Sahara Desert transformed. NASA image, public domain. This is profound because the Sahara covers a vast area of some 9.2 million square kilometers. The region is no stranger to desert climates, as just northeast of the Karakum desert is the Kyzyl Kum. C) Atacama Desert in Chile. The desert cools off significantly at night, allowing these critters to catch a break from the punishing heat. For millions of years, the Sahara was a desert subject to extreme climatic fluctuations and at times turned green again during the warm periods. Desertification is a process of soil degradation in arid areas due to factors such as climatic characteristics and human activity. If anything they've been expanding during the past 3 decades as result of demographic challenges such as over grazing, land exhaustion and over drafting of groundwater . However, the fate of rainfall in this region in the coming future remains an open question because of both the ongoing climate change and the possible human intervention through geoengineering. Glaciers melting and reservoirs sinking. Defining Africa's northern bulge, the Sahara makes up 25 percent of the continent. Summary: The Sahara Desert has expanded by about 10 percent since 1920, according to a new study. The Sahara — the world’s biggest desert — is getting even bigger. This is profound because the Sahara covers a vast area of some 9.2 million square kilometers. For a good four decades, however, the Sahel has since been greening. Reflecting Light. In the late 90s to mid 2000s, the thought was that the Sahara desert was expanding southwards by a certain extent each year. Which desert is caused by a Hadley cell? Sometime between 11,000 and 5,000 years ago, after the last ice age ended, the Sahara Desert transformed. The Sahara — the world’s biggest desert — is getting even bigger. Reportedly, most of the billions of trees planted died. F or Paul Bowles, the Sahara was “one of the last great terrae incognitae left on this shrinking planet”. It is the spread of arid areas caused by a variety of factors, such as climate change (particularly the current global warming) and overexploitation of soil as a result of human activity. Eight percent of that translates into more than 700,000 square kilometers. The research is the first to assess century-scale changes to the boundaries of the world’s largest desert and suggests that other deserts could be expanding as well. They are rare fox species, their small size, rounded eyes and big ears make them unique. 20. Flashback 2009: Scientists are now seeing signals that the Sahara desert and surrounding regions are greening due to increasing rainfall. The desert is subject to constant change. Temperatures can range from 54° Celsius (130° F) on the hottest days to freezing on the coldest nights. His 1949 novel The Sheltering Sky … Camels walk on the sand during the “Gallops of Morocco” equestrian race in March in the southern Moroccan Sahara desert. Since the 1960s it has been afflicted by prolonged periods of extensive drought. The answer is: a. The desert seashells were roughly 20,000 years old, from the vanished depths of the giant Pleistocene-era Lake Bonneville—the product of a … Recent study by Venter et al finds that the Sahara has shrunk by 8% over the past three decades. It Snows in the Sahara Desert. Thereof, what does Sahel mean in English?-hāl′, -hēl′) A semiarid region of north-central Africa south of the Sahara Desert. The Sahara desert is one of the harshest, most inhospitable places on the planet, covering much of North Africa in some 3.6 million square miles of rock and windswept dunes. 1. The southern Saharan desert is in retreat, making farming viable again in what were some of the most arid parts of Africa. From 1920 to … Also not long ago a study by Venter et al (2018) found the Sahara desert had shrunk by 8% over the previous three decades. F or Paul Bowles, the Sahara was “one of the last great terrae incognitae left on this shrinking planet”. Annual precipitation never exceeds 25 centimeters (10 inches), and some areas go without rain for years. Also know, what does Sahel mean in English?-hāl′, -hēl′) A semiarid region of north-central Africa south of the Sahara Desert. ... the other of shrinking sheets of ice - … This is profound because the Sahara covers a vast area of some 9.2 million square kilometers. The Sahara is actually shrinking, with vegetation arising on land where there was nothing but sand and rocks before.4 The southern border of the Sahara has been retreating since the early 1980s, making farming viable again in what were some of the most arid parts of Africa. The Sahara Desert may be millions of years older than scientists thought, researchers report in the Sept. 18 Nature. It has an annual rainfall of around 5 inches. Dire predictions of human-induced global warming leading to expanding deserts are colliding with emerging evidence that something else is going on: North Africa’s desolate Sahara Desert is actually shrinking, with vegetation arising on land where. The area is particularly sensitive to drought, and historically the lake has fluctuated dramatically in size during prolonged dry periods. The original research was about the Sahel region (southern part bordering the savanna) becoming greener as determined by satellite images from 1982 to 2002. Depending on how hard the downpour is, the water could trigger a Younger Dryas-style disruption of the thermohaline circulation and subsequent cooling (and, given that it's very warm compared to the waters of Lake Agassiz, … This region has a population of approximately 1.1 billion people (2019), up from 845.7 million in 2009. Five thousand years ago, the Sahara rangelands were drying and Lake Turkana was receding at the end of what is known as the African Humid Period. The goal is to reforest 1 million square kilometers covering an entire one percent of all arable land on the planet. Recent study by Venter et al finds that the Sahara has shrunk by 8% over the past three decades. Summary: The Sahara Desert has expanded by about 10 percent since 1920, according to a new study. New study finds that the world’s largest desert grew by 10 percent since 1920, due in part to climate change. It is widely believed that the Sahara desert is no more than ∼2-3 million years (Myr) old, with geological evidence showing a remarkable aridification of north Africa at the onset of the Quaternary ice ages. Desertification is a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly arid. Assertions that global warming is causing Africa to dry up, resulting in expanding deserts and shrinking crop production, are simply false. The Sahara desert is one of the harshest, most inhospitable places on the planet, covering much of North Africa in some 3.6 million square miles of rock and windswept dunes. 2. The most likely scenario is this: the rain turns the Sahara into a giant slurry which drains into the Atlantic via the Senegal river valley. His 1949 novel The Sheltering Sky was inspired by the desert’s “intensely poetic” dunes and in a later essay he described its impact on him: “In this wholly mineral landscape lighted by stars like flares, even memory disappears; nothing is left but your own … The Karoo Desert is located in South Africa. 19. A secret stash of deadly chemicals... Add to Booklist. The Sahara Desert is made up of sand dunes, sand seas, gravel plains, stone plateaus, salt flats, dry valleys, mountains, rivers, streams, and oases. There is sparse grassland in some parts of the desert including the highlands and northern and southern parts of the desert. The Antarctic is classified as a polar desert. ... Our precious water levels in rivers are shrinking. Sahara shrinking, becoming greener. This desert -shrinking trend is supported by climate models, which predict a return to conditions that turned the Sahara into a lush savanna some 12,000 years ago. This desert-shrinking trend is supported by climate models, which predict a return to conditions that turned … In recent years, they are domesticated as pets and one of the most adorable, popular exotic pets. Sahara shrinking, becoming greener. In the Sahara, animal and plant populations were fragmented and restricted to certain favoured areas such as moist areas of mountain ranges; this happened for example to fish and crocodiles which only persist in isolated water bodies. That’s an area that’s almost as big as Germany and France combined! His 1949 novel The Sheltering Sky … A shrinking oasis in the Sahara Desert. A shrinking oasis in the Sahara Desert; a stolen US Army drone; an uninhabited Japanese island; and one country’s secret stash of deadly chemical poisons: All these play roles in a relentlessly escalating crisis. Before that time, north African aridity was mainly controlled by the African summer monsoon … The people of Lothagam faced unprecedented change and an uncertain future driven by the inexorable forces of plate tectonics, celestial mechanics, and changing climate. Each is a threat to the stability of the world but individually are problems that can be overcome. Experts who have studied the desert for over 30 years have discovered that the edges of the desert are becoming greener. One of the greatest human endeavors is underway right now in Africa - to intentionally grow the largest living structure on the planet. If anything they've been expanding during the past 3 decades as result of demographic challenges such as over grazing, land exhaustion and over drafting of groundwater . Lake Chad is in the Sahel, the vast semi-arid region south of the Sahara desert. It spans 12 countries in North Africa:... Karoo Desert. Sahara shrinking, becoming greener Also not long ago a study by Venter et al (2018) found the Sahara desert had shrunk by 8% over the previous three decades. Greenhouse gases are atmospheric gases that absorb infrared radiation and trap heat in the atmosphere. It is almost pointless to try and find out whether the Sahara is growing or shrinking, because of the sheer size of the desert (as well as demarcating what exactly constitutes 'desert'). China made some small initial modest gains slowing the Gobi desert producing high dust content in the air at Beijing, but that was artificial; and, the desert is still advancing. The U.S. Navy has the world's largest aircraft carrier fleet, with ten in service, two in the reserve … The Sahara is the worlds largest hot desert, covering 8.5 million square kilometers (3.3 million square miles), about the size of the South American country of Brazil. You would think that increasing temperatures would make things worse in the deserts of the world, but in a rather counterintuitive instance of planet watching, it appears that the Sahara desert may actually be shrinking. The original research was about the Sahel region (southern part bordering the savanna) becoming greener as determined by satellite images from 1982 to 2002. Before that time, north African aridity was mainly controlled by the African summer monsoon … Sahara shrinking, becoming greener. Answer: No. Sub-Sahara Africa comprises African countries lying south of the Sahara Desert. According to plate tectonics theory, Earth's outer shell is divided into multiple plates that slowly glide over the mantle. From … Sahara Desert. A secret stash of deadly chemicals. The shrinking Aral Sea lies to the north of the desert, expanding the desert’s size by what is called the Aral Karakum, a desert in Kazakhstan that has formed on the former seabed. Blanketing much of the northern third of the African Continent, or some 3.5 million square miles, the Sahara Desert, the largest desert in the world, extends eastward from the Known as the Sahel, meaning “border or margin,” this zone is where the dry arid conditions of the desert north meet up with the moister region of the tropics. The Sahara is expanding southwards into an area called the Sahel.The process is called desertification or desertization. Answer (1 of 3): I upvoted Mr. Chippindale’s reply. This means drying up the soil, and in this case it is the expansion of the Sahara. New study finds that the world’s largest desert grew by 10 percent since 1920, due in part to climate change. The Fennec fox is the smallest nocturnal fox and canine species in the world, found in Sahara of North Africa and also known as the desert fox. It has a rich range of animals, including antelopes,... Kalahari Desert. With temperatures reaching up to 136 degrees Fahrenheit, Northern Africa's Sahara Desert rarely gets cold enough for snow. ... the other of shrinking sheets of ice - … The Aralkum Desert is a desert that has appeared since 1960 on the seabed once occupied by the Aral Sea. No effect on K: off spring live longer. It has grown by as much as 18 percent during the past century, and … The Mojave Desert is the driest desert in the United States. The following are quotes from the Encyclopedia Britannica Online (April 22, 2005): "Public awareness of desertification increased during the severe drought in the Sahel in Africa (1968–73), a drought that accelerated the southward movement of the Sahara … warming has exactly the opposite effect on the Sahara and the Sahel. (see above: NASA image) According to Wikipedia, the Sahara covers a vast area of some 9.2 million square kilometers. It is, as you rightly say, larger than the Sahara (Antarctica is about 14.2 million square kilometres in size, and the Sahara is just over 9 million square kilometres). As you rightly point out, Antarctica is clearly the largest desert on Earth. With a population growth rate of 2.3% per annum, the UN predicts the region’s population will be 2-2.5 billion by 2050. A few thousand years ago, a mighty river flowed through the Sahara across what is today Sudan. The Sahara Desert is vast – the largest desert in Africa. It is almost pointless to try and find out whether the Sahara is growing or shrinking, because of the sheer size of the desert (as well as demarcating what exactly constitutes 'desert'). Nat Geo article says "Sahara Desert Greening" I don't know where OP got the idea that it was actually shrinking. Nearly a century of data shows that the enormous Sahara Desert is growing. Climate Change Is Shrinking The Sahara. But the arable land at the nation’s southern edge is shrinking, and its potential for growing wheat declining. The Sahara Desert covers an area of ~9 million km2 across North Africa, extending from ~12°N to ~34°N, making it the largest non-polar desert in the world [4, 5]. Lake Chad is a large, but shallow endorheic lake located on the African continent, in the Western part of Chad, on the edge of the Sahara desert. Description : In The Whistler, Lacy Stoltz investigated a corrupt judge who was taking millions in bribes from a … The Sahara Desert owes its existence to a particular combination of regional continental geography and atmospheric circulation. The sahara desert (SD) During 1950–2015, observed climate index shows that SD OBS-Clim covers about 9.5 × 10 6 km 2 across North … It is inhospitable desert now. Silver ants, a species of insect native to the Sahara Desert, have an incredible adaptation that keeps them cool even in the blazing sunlight of midday. km, the Sahara Desert is considered the world’s largest hot desert and the third most extensive desert after the polar deserts of Antarctica and the northern Arctic.The Sahara Desert encompasses a major portion of North Africa, occupying about 31% of the entire African continent. And there is possibly a completely different, far more conspicuous and momentous one ahead of us. Nat Geo article says "Sahara Desert Greening" I don't know where OP got the idea that it was actually shrinking. At Bark River Knives, the emphasis is on maximum performance -- real-world performance, in the field. According to desert geologist Stefan Kröpelin, who has studied geological data for the eastern Sahara going back 6,000 years, the desert spread as temperatures dropped. The Sahara is growing, thanks in part to climate change. Yet between 5,000 and 10,000 years ago, a period of time commonly referred to as the ‘African Humid … If sustained, these rains could revitalize drought-ravaged regions, reclaiming them for farming communities. Climate Change Is Shrinking The Sahara. Is the Sahara Desert shrinking? The Sahara Desert is expanding. The study results suggest that human-caused climate change, as well as natural climate cycles such as the Atlantic Multidecadal Oscillation (AMO), caused the desert's expansion. The geographical pattern of expansion varied from season to season, with the most notable differences occurring along the Sahara's northern and southern boundaries. It has grown by as much as 18 percent during the past century, and climate change is partly responsible. The story of an ever-shrinking lake has been built … And there is possibly a completely different, far more conspicuous and momentous one ahead of us. Important desert crops include date palms and cotton. B) Desert next to the Rockies. According to Wikipedia, the Sahara covers a vast area of some 9.2 million square kilometers. Those magnificent palm groves are the blood and bone of the desert; life in the Sahara would be unthinkable without them. From a quarter to half of Earth’s vegetated lands has shown significant greening over the last 35 years largely due to rising levels of atmospheric carbon dioxide, according to a new study published in the journal Nature Climate Change on April 25. Desert greening is the process of man-made reclamation of deserts for ecological reasons (biodiversity), farming and forestry, but also for reclamation of natural water systems and other ecological systems that support life.The term "desert greening" is intended to apply to both cold and hot arid and semi-arid deserts (see Köppen climate classification system). A parking lot is built, shrinking the habitat. It lies to the south and east of what remains of the Aral Sea in Uzbekistan and Kazakhstan . The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States.The U.S. Navy is the largest, most capable navy in the world, with the highest combined battle fleet tonnage. Actually, a tundra often differs from a cold … Green Shoots The green shoots of recovery are showing up on satellite images of regions including the Sahel, a semi-desert zone bordering the Sahara to the south that stretches some 2,400 miles (3,860 … Answer (1 of 3): I upvoted Mr. Chippindale’s reply. The Sahara today forms one of the largest and driest expanses of land on Earth. Morocco’s shrinking child cohort reflects the decline of its total fertility rate from 5 in mid-1980s to 2.2 in 2010, which is a result of increased female educational attainment, higher contraceptive use, delayed marriage, and the desire for smaller families. This is profound because the Sahara covers a vast area of some 9.2 million square kilometers. Carbon Dioxide Fertilization Greening Earth, Study Finds. Weeks of heavy rainfall capped by a particularly strong tropical disturbance caused the Licungo and other rivers in Mozambique's Zambezia province to flood. 4 The southern border of the Sahara has been retreating since the early 1980s, making farming viable again in what Also not long ago a study by Venter et al (2018) found the Sahara desert had shrunk by 8% over the previous three decades. The Sahara — the world's biggest hot desert — is getting even bigger. Timbuktu flourished from trade in salt, gold, ivory and slaves. Lake Chad sits within the Sahel, a semiarid strip of land dividing the Sahara Desert from the humid savannas of equatorial Africa.The Chad Basin spans more than 2.4 million square kilometers, and is bordered by mountain ranges. Is Sahara Desert growing or shrinking? NASA image, public domain. Since the 1960s it has been afflicted by prolonged periods of extensive drought. In fact, it is currently about 10 percent larger than it was nearly a century ago, and scientists suggest that climate change is partly responsible. A species with the same food requirements is introduced. 3,500 years ago, the desert began to dry out, a process that continues intermittently to this day. … Sahara desert and surrounding regions are greening due to increasing rainfall. China made some small initial modest gains slowing the Gobi desert producing high dust content in the air at Beijing, but that was artificial; and, the desert is still advancing. Is the Sahara desert growing or shrinking? D) Patagonian Desert in Argentina. It is widely believed that the Sahara desert is no more than ∼2-3 million years (Myr) old, with geological evidence showing a remarkable aridification of north Africa at the onset of the Quaternary ice ages. In the West, its name has become synonymous with exotic locales. A shrinking oasis in the Sahara Desert. A) Sahara Desert in Africa. Each is a threat to the stability of the world but individually are problems that can be overcome. This desert-shrinking trend is supported by climate models, which predict a return to conditions that turned the Sahara into a lush savanna some 12,000 years ago. The study was published online March 29, 2018, in the Journal of Climate. In the diplomatic arena though, everyone will have a different way of dealing with such a threat. (see above: NASA image) According to Wikipedia, the Sahara covers a vast area of some 9.2 million square kilometers. Sahara is the largest desert in the world and one of the three largest. According to desert geologist Stefan Kröpelin, who has studied geological data for the eastern Sahara going back 6,000 years, the desert spread as temperatures dropped. Impacted by climate change, the Sahara Desert is getting bigger. Deserts are defined as regions that experience 100 millimeters (less than 4 inches) of rain per year, or less. As such, the title of “desert” is expanded to the Arctic basin and the continent of Antarctica as well, despite them not inspiring the typical desert images of sand and heat. Those magnificent palm groves are the blood and bone of the desert; life in the Sahara would be unthinkable without them. But it is not unheard of! A secret stash of deadly chemicals. If sustained, these rains could revitalize drought-ravaged regions, reclaiming them for farming communities. Also not long ago a study by Venter et al(2018) found the Sahara desert had shrunk by 8% over the previous three decades. Covering a massive area of 9,200,000 sq. The culprit: climate change. Find the latest science news articles, photos and videos covering space, the environment, human development and more on NBCNews.com. Unrelated research finds the Sahara desert is expanding at the same time that the Greenland ice sheet is melting faster than we've ever seen. This is potentially linked to warmer air being able to hold more moisture. The Sahara desert has gotten 10 percent bigger since 1920. The Judge's List Author : John Grisham Publisher : Hodder & Stoughton. Recent study by Venter et al finds that the Sahara has shrunk by 8% over the past three decades. Stretching across the widest part of Africa on the southern edge of the Sahara Desert is the African Transition Zone. Likewise, what does Sahel mean in English?-hāl′, -hēl′) A semiarid region of north-central Africa south of the Sahara Desert. By January 20, the Licungo was higher than it had been since 1971. ... Silt used to … In the late 90s to mid 2000s, the thought was that the Sahara desert was expanding southwards by a certain extent each year. Global cooling meant that the air had less capacity to hold moisture from the oceans, leading to fewer rains and more arid climes. At 0.19 million square miles (0.49 million sq. The water level is largely controlled by the inflow from rivers, notably the Chari River from the south and, seasonally, the Komodugu-Yobe from … This desert-shrinking trend is supported by climate models, which predict a return to conditions that turned the Sahara into a lush savanna some 12,000 years ago. The Sahara is the largest hot desert on Earth, smaller only than our two polar deserts, and it's no small feat to change it this way. Scientific evidence shows that the Sahara is actually shrinking. This shrinking is attributed to climate change. The sahara desert (SD) During 1950–2015, observed climate index shows that SD OBS-Clim covers about 9.5 × 10 6 km 2 across North … Sahara Desert. Since the 1960s it has been afflicted by prolonged periods of extensive drought. 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Arid climes 3 ): I upvoted Mr. Chippindale ’ s southern edge is shrinking, becoming greener //en.wikipedia.org/wiki/Desert_greening >. The Sahara desert has expanded by about 10 percent since 1920, due in part climate... Experience 100 millimeters ( less than 4 inches ) of rain per year or... – the largest desert on Earth just northeast of the Sahara to green again much earlier would! The Kalahari stretches across Botswana, Namibia, and some areas go rain. Celsius ( 130° F ) on the natural cycle alone has expanded by about 10 percent since 1920, in. Based on the natural cycle alone defined as regions that experience 100 millimeters ( less than inches... Desert in the world < /a > Sahara < /a > the culprit: change! Higher than it had been since 1971 as you rightly point out, Antarctica is clearly the largest in! Of that translates into more than 700,000 square kilometers to warmer air able! Expansion of the Aral Sea in Uzbekistan and Kazakhstan biggest hot desert — is getting bigger climate! Ergs, regs, hamadas, and oases is shrinking the Sahara covers a vast area of some million... Was published online March 29, 2018, in the late 90s to mid 2000s, the today... Point out, Antarctica is clearly the largest desert in the field thought was that the air had capacity! Are deserts in North Africa: Resources < /a > Sahara desert is.! Live longer published online March 29, 2018, in the world < /a > by Pearce... River flowed through the Sahara desert what that Means... < /a > about BRK have discovered the! ) of rain per year, or less the enormous Sahara desert growing or shrinking potential for wheat... 8 % over the past century, and south Africa as Germany and France combined land on the coldest.... ( 2019 ), up from 845.7 million in 2009 extensive drought YouTube /a. //Www.Reddit.Com/R/Askscience/Comments/1Ravcx/Is_The_Sahara_Desert_Growing_Or_Shrinking/ '' > Never < /a > a is vast – the largest and driest expanses of land the. Different way of dealing with such a threat to the stability of Sahara!
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