The short answer is yes. But, how do we know this? A number of studies, including one that spanned 93 years by researchers at the University of Maryland, have concluded that the sands of the Sahara have been expanding for some time, primarily southward into the Sahel region. Having grown an estimated 10% since 1920, this is an undeniable fact that continues to be demonstrated year after year, with expansion often at its fastest during the summer months when the already dry desert becomes even more absent of water.
Username: Colours Published on 2024-11-27 01:07:21 ID NUMBER: 125780
The Sahara Desert spans approximately 9.2 million square kilometers and is in fact the largest hot desert in the world. Located in North Africa, it covers parts of eleven countries, including Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan, Algeria, and Tunisia. This expanse of arid land is characterized by its often harsh climate, with massive temperature swings that can soar above 50 degrees Celsius during the day and plummet below freezing at night.
The Sahara is built up of a diverse amount of geographic landscapes, comprising mainly of sand dunes, gravel plains, rocky plateaus, and even some mountain ranges, such as the Ahaggar (with peaks rising above 9,500 feet) and Tibesti ranges (containing Mount Emi Koussi, a peak that rises a lofty 11,204 feet). Its iconic sand dunes, particularly in Algeria and Libya, can reach heights of up to 180 meters!
Human settlement in the Sahara Desert is limited but historically significant. Nomadic tribes, such as the Tuareg and Berbers, have traveled this desert for centuries, passing through it mainly for trade while other groups of people wouldn't dare try (understandably). There are some oases, providing vital water sources, that serve as hubs for small to medium-sized towns and cities, like Ghardaia in Algeria and Timbuktu in Mali, the latter being a UNESCO World Heritage site.
The short answer is yes. But, how do we know this? A number of studies, including one that spanned 93 years by researchers at the University of Maryland, have concluded that the sands of the Sahara have been expanding for some time, primarily southward into the Sahel region. Having grown an estimated 10% since 1920, this is an undeniable fact that continues to be demonstrated year after year, with expansion often at its fastest during the summer months when the already dry desert becomes even more absent of water.
The growth of the Sahara Desert is mainly driven by natural climate variability and human-induced climate change. Naturally, a process called the Atlantic Multidecadal Oscillation (AMO), a periodic climate cycle in the North Atlantic Ocean, significantly influences this expansion by affecting regional rainfall patterns. In the case of the Sahara, during warm phases of the AMO, this region experiences drier conditions, causing the desert landscape to spread.
The Sahara Desert's expansion is causing significant environmental and socio-economic issues. As mentioned, the southward creep of the desert into the Sahel is exacerbating drought conditions, making it difficult for local populations to maintain their agricultural and pastoral livelihoods. The loss of this farmland leads to food insecurity, pushing communities into poverty and increasing competition for resources. This can, and sometimes has, resulted in conflict and displacement as people migrate in search of more habitable areas.
As mentioned before, the Sahara's growth results from the complex interplay between natural cycles and climate change. Tackling this issue requires understanding these drivers and implementing strategies to mitigate their impacts on vulnerable regions. Reducing greenhouse gas emissions and adopting sustainable land management practices are some of the steps we can also take part in to help address the root causes of desertification.
The short answer is yes. But, how do we know this? A number of studies, including one that spanned 93 years by researchers at the University of Maryland, have concluded that the sands of the Sahara have been expanding for some time, primarily southward into the Sahel region. Having grown an estimated 10% since 1920, this is an undeniable fact that continues to be demonstrated year after year, with expansion often at its fastest during the summer months when the already dry desert becomes even more absent of water.
The best book in the world is the Quran Sharif.
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After coming home from the festival, the pictures were taken CHFT202000
🆔: SMTR LMBM - CHFT CHFT202000
After coming home from the festival, I took pictures.
উত্সব থেকে বাড়ি আসার পরে আমি ছবি তুললাম।
After coming home from the festival, the pictures were taken.
উত্সব থেকে বাড়ি আসার পরে ছবিগুলি তোলা হয়েছিল।
Festivals, Festivity, Solemnity, Miniver, Fire.
উত্সব, উত্সব, সংহতি, মিনিভার, মেলা.
Kathalia, Jatrapur, 🏡 Laltila, Nirvoypur, Nirbhoypur, Kathalia, Sonamura, Sepahijala, West-Tripura, Indians - Susmita Aktar Akter Akhtar Akhter Akthar Akther and Lima Bagam Begam Bagom Begom.
OPPO OPPO A3s, ƒ/2.2 3.47mm - Photo taken on Saturday 18 January 2020 05 PM.
Did you know that the Cicindela hudsoni, also known as the Australian Tiger Beetle, has been recorded as the fastest insect in the world? Despite its small size, it can run at an average speed of 5.5 mph (9 km/h), equivalent to a relative rate of 171 body lengths per second.
Interestingly, Tiger Beetles use a distinct chasing pattern known as "stop-and-go." They pause in the middle of their pursuit. The reason for this behavior is their poor eyesight. They cannot gather enough photons to form a clear image of their prey if they move too quickly. Therefore, they must stop, look around, and continue their chase.
The ecosystem and living organisms' cells have six primary elements: oxygen, hydrogen, carbon, nitrogen, phosphorus, and sulfur. The nutrient cycle, or the biogeochemical cycle, is the movement of these nutrients from the environment into plants, animals, and humans and recycling it again.
The primary elements mentioned earlier move through the earth’s ecosystem—atmosphere, water bodies, soil, and living organisms. It recycles and reuses these elements to maintain order. These nutrients fuel life, recycling themselves in a closed loop.
Nutrient cycles occur through living and nonliving organisms using chemical, biological, and geological processes. However, soil microbes are an essential element that helps foster nutrient cycles. Soil and its microbes help break down organic matter and release nutrients into a processing cycle, changing forms until they return to their original state.
The tarantula hawk wasps (also called the parasitic pepsis wasp) hunt tarantulas. The female wasp stings the tarantula to paralyze it. Then, it carries the tarantula's body back to the burrow and lays eggs on the spider's body. When the egg hatches, the wasp larvae will have a ready food source in the paralyzed spider, which they feed on as they grow.
In the early 1900s, there were approximately 500,000 rhinos found in Africa and Asia. However, by 1970, the rhino numbers dropped to 70,000. Unfortunately, today there are only around 27,000 remaining rhinos in the wild. Rhino poaching remains their most significant threat. Poachers target their valuable horns, which are highly sought-after trophies in the illegal wildlife trade and traditional Asian medicine markets.
Poachers relentlessly hunt and kill rhinos, pushing several rhino species to extinction. To make matters worse, the increasing human populations also contribute to habitat loss for these animals. Climate change is intensifying drought and affecting vegetation, further compounding the challenges rhinos face.
IUCN lists the three species of rhino—black, Javan, and Sumatran—as critically endangered species. The white rhino (Ceratotherium simum) is listed as near threatened, with an estimated population of around 18,000. Despite being listed as vulnerable, the Greater One-Horned Rhino (Rhinoceros unicornis) has one of Asia's most successful conservation stories. Thanks to the conservation efforts of Indian and Nepalese authorities, their population has significantly increased.
Conservation efforts to protect rhinos include anti-poaching measures, habitat protection, and community engagement. Well-trained rangers with advanced technology apprehend poachers and dismantle trafficking networks. Translocation, population management, and reducing demand for rhino products are also crucial.
Organizations like the International Rhino Foundation and Save the Rhino International, alongside governments and communities in countries with rhino populations, are actively involved in rhino conservation.
Be part of the solution by simply spreading these rhinoceros facts.
The Sahara Desert spans approximately 9.2 million square kilometers and is in fact the largest hot desert in the world. Located in North Africa, it covers parts of eleven countries, including Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan, Algeria, and Tunisia. This expanse of arid land is characterized by its often harsh climate, with massive temperature swings that can soar above 50 degrees Celsius during the day and plummet below freezing at night.
