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solomon4
Casual Earth
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Comments by "solomon4" (@solomon4554) on "Why Is There a Desert in Somalia? Odd Geography" video.
​ @casualearth-dandavis best of luck to you!
29
Does the fact that the Indian ocean is landlocked also cause aridity in Arabia? As there's no northern high-pressure area and therefore no warm currents or onshore winds that would bring rain to the Arabian peninsula and North Africa as is the case in the southern United States or southern China, hence no Humid Subtropical climates in these parts as is the case in similar latitudes elsewhere.
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Mombasa has a Savanna climate as opposed to an arid one.
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😂😂
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My takeaway from this: Arabia north of the Tropic of Cancer is within the normal latitude of atmospheric subsidence within the Hadley Cell, but southern Arabia, at a latitude of 12° north, is within the normal latitude of Tropical Savanna climates and is a desert for entirely different reasons, and would have had a monsoon were it not for India.
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@skp8748 Mount Kilimanjaro, Somali Plateau..
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Same!
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@casualearth-dandavis but wouldn't that mean they'd have to pass over Tanzania first? Northern Tanzania is very dry during boreal summer.
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@JL-ti3us it's called Geodiode, his climate videos are the creme de la creme.
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El Niño does occasionally bring heavy rain to Somalia
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There's a video about that on this channel. It's called "why is there a desert in the Caribbean".
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I was always confused by the strip of Semi-arid climate in the northern black sea while looking at climate maps. Thanks for clearing up my confusion.
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@casualearth-dandavis yes I've seen that video of yours, amazing work as always.
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@casualearth-dandavis quick question though, how far north does this 'anti-monsoon reach? As in where do summer northerlies end and summer westerlies begin?
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@casualearth-dandavis you misreading my comment just provided me with more information that I didn't know about so there's no complaining about that lol.
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At long last
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I completely agree
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The Caatinga is dry due to the way in which the ITCZ is positioned over the region, though local geography is also a factor. The ITCZ is positioned north of the region for most of the year, so the northeast trade winds don't really make landfall in that part of Brazil. At the same time, the southeast trade winds lie in the rain shadow of Brazil's coastal escarpment, meaning relatively little rain falls on the leeward side. By contrast, Salvador on the coast has a very wet tropical rainforest climate on the other side of the escarpment. The Caatinga does have a short wet season in spring when the ITCZ moves over the region, though it's not enough to push it out of the semi-arid zone. I hope this was helpful.
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Gplates and maptoglobe. The only climate simulation software I've heard of so far is ClimaSim, which only simulates temperature but not precipitation.
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Add to that the rain shadow effect of the Satpura and Vindhya ranges in India to the east and the Sulaiman Mountains of Pakistan in the west.
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​​ @casualearth-dandavis At 4:27 you show easterly winds curving into westwrlies over the Congo rainforest. I do know that westwrlies do come off the Gulf of Guineas, but do the westerlies over the Congo originate from the Mascarene or South Atlantic anticyclone? It wouldn't make sense for them to go over the cold Benguela current so far eastward.
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​ @casualearth-dandavis does moisture from the Indian Ocean also reach the Congo Basin from easterly low-level jets that cross through gaps in the Rift Mountains and slow down over Central Africa during Northern Hemisphere summer, similar to the Turkana jet?
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In addition to what Mr Davis has mentioned, I'd like to add that in January (Southern Hemisphere summer) the cold Benguela current is at its southernmost extent around the Namib Desert, allowing easterly winds to blow from the Atlantic Ocean into the Congo Basin at this time of year. This is evident in the climate graphs of cities like Libreville, which can receive upwards of 250 mm of rain in January. Hope this clears up some confusion.
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Your pfp matches with the comment
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Climatologically they're both deserts. But they have different environment and biomes.
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@mohamedhussein4124 parts of it are semi-arid but the majority is desert, climate-wise at least. Again, climate ≠biome.
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@mohamedhussein4124 plus arid is just another word for desert, you're contradicting yourself.
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