Why is the daily range of temperature very high in hot deserts?
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Answer:
Temperatures exhibit daily extremes because the atmosphere contains little humidity to block the Sun's rays. Desert surfaces receive a little more than twice the solar radiation received by humid regions and lose almost twice as much heat at night. Many mean annual temperatures range from 20-25° C.
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ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇs ᴇxʜɪʙɪᴛ ᴅᴀɪʟʏ ᴇxᴛʀᴇᴍᴇs ʙᴇᴄᴀᴜsᴇ ᴛʜᴇ ᴀᴛᴍᴏsᴘʜᴇʀᴇ ᴄᴏɴᴛᴀɪɴs ʟɪᴛᴛʟᴇ ʜᴜᴍɪᴅɪᴛʏ ᴛᴏ ʙʟᴏᴄᴋ ᴛʜᴇ sᴜɴ's ʀᴀʏs. ᴅᴇsᴇʀᴛ sᴜʀғᴀᴄᴇs ʀᴇᴄᴇɪᴠᴇ ᴀ ʟɪᴛᴛʟᴇ ᴍᴏʀᴇ ᴛʜᴀɴ ᴛᴡɪᴄᴇ ᴛʜᴇ sᴏʟᴀʀ ʀᴀᴅɪᴀᴛɪᴏɴ ʀᴇᴄᴇɪᴠᴇᴅ ʙʏ ʜᴜᴍɪᴅ ʀᴇɢɪᴏɴs ᴀɴᴅ ʟᴏsᴇ ᴀʟᴍᴏsᴛ ᴛᴡɪᴄᴇ ᴀs ᴍᴜᴄʜ ʜᴇᴀᴛ ᴀᴛ ɴɪɢʜᴛ. ᴍᴀɴʏ ᴍᴇᴀɴ ᴀɴɴᴜᴀʟ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇs ʀᴀɴɢᴇ ғʀᴏᴍ 20-25° ᴄ.
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