how Stevenson thermometers work
Answers
Hello friend!
A Stevenson screen (also known as an instrument shelter) is a meteorological screen to shield instruments against precipitation and direct heat radiation from outside sources, while still allowing air to circulate freely around them. It forms part of a standard weather station.
Answer:
ᴀ sᴛᴇᴠᴇɴsᴏɴ sᴄʀᴇᴇɴ (ᴀʟsᴏ ᴋɴᴏᴡɴ ᴀs ᴀɴ ɪɴsᴛʀᴜᴍᴇɴᴛ sʜᴇʟᴛᴇʀ) ɪs ᴀ ᴍᴇᴛᴇᴏʀᴏʟᴏɢɪᴄᴀʟ sᴄʀᴇᴇɴ ᴛᴏ sʜɪᴇʟᴅ ɪɴsᴛʀᴜᴍᴇɴᴛs ᴀɢᴀɪɴsᴛ ᴘʀᴇᴄɪᴘɪᴛᴀᴛɪᴏɴ ᴀɴᴅ ᴅɪʀᴇᴄᴛ ʜᴇᴀᴛ ʀᴀᴅɪᴀᴛɪᴏɴ ғʀᴏᴍ ᴏᴜᴛsɪᴅᴇ sᴏᴜʀᴄᴇs, ᴡʜɪʟᴇ sᴛɪʟʟ ᴀʟʟᴏᴡɪɴɢ ᴀɪʀ ᴛᴏ ᴄɪʀᴄᴜʟᴀᴛᴇ ғʀᴇᴇʟʏ ᴀʀᴏᴜɴᴅ ᴛʜᴇᴍ. ɪᴛ ғᴏʀᴍs ᴘᴀʀᴛ ᴏғ ᴀ sᴛᴀɴᴅᴀʀᴅ ᴡᴇᴀᴛʜᴇʀ sᴛᴀᴛɪᴏɴ. ᴛʜᴇ sᴄʀᴇᴇɴ ᴄʀᴇᴀᴛᴇs, ᴀs ɴᴇᴀʀ ᴘᴏssɪʙʟᴇ, ᴀ ᴜɴɪғᴏʀᴍ ᴇɴᴠɪʀᴏɴᴍᴇɴᴛ ɪɴ ʀᴇʟᴀᴛɪᴏɴ ᴛᴏ ᴛʜᴇ ᴀɪʀ ᴏᴜᴛsɪᴅᴇ, ᴀɴᴅ ɪs ᴜsᴇᴅ ᴛᴏ sʜᴇʟᴛᴇʀ ᴠᴀʀɪᴏᴜs ᴛʏᴘᴇs ᴏғ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴀɴᴅ ʜᴜᴍɪᴅɪᴛʏ ᴍᴇᴀsᴜʀɪɴɢ ɪɴsᴛʀᴜᴍᴇɴᴛs. ᴛʜᴇ sᴍᴀʟʟᴇsᴛ sᴄʀᴇᴇɴs ᴄᴏɴᴛᴀɪɴ ᴀ ᴅʀʏ ʙᴜʟʙ ᴛʜᴇʀᴍᴏᴍᴇᴛᴇʀ ᴀɴᴅ ᴀ ᴡᴇᴛ ʙᴜʟʙ ᴛʜᴇʀᴍᴏᴍᴇᴛᴇʀ. ʟᴀʀɢᴇʀ sᴄʀᴇᴇɴs ᴀʟsᴏ ɪɴᴄʟᴜᴅᴇ ᴍɪɴɪᴍᴜᴍ ᴀɴᴅ ᴍᴀxɪᴍᴜᴍ ᴛʜᴇʀᴍᴏᴍᴇᴛᴇʀs. sᴛɪʟʟ-ʟᴀʀɢᴇʀ sᴄʀᴇᴇɴs ᴄᴀɴ ᴄᴏɴᴛᴀɪɴ ʀᴇᴄᴏʀᴅɪɴɢ ɪɴsᴛʀᴜᴍᴇɴᴛs: ᴀ ᴛʜᴇʀᴍᴏɢʀᴀᴘʜ ᴀɴᴅ/ᴏʀ ᴀ ʜʏɢʀᴏɢʀᴀᴘʜ, ᴏʀ ᴀ ᴛʜᴇʀᴍᴏʜʏɢʀᴏɢʀᴀᴘʜ ᴡʜɪᴄʜ ᴄᴏᴍʙɪɴᴇs ᴛʜᴇ ғᴜɴᴄᴛɪᴏɴs ᴏғ ᴛʜᴏsᴇ ᴛᴡᴏ ɪɴsᴛʀᴜᴍᴇɴᴛs. ᴛʜᴇ sᴛᴇᴠᴇɴsᴏɴ sᴄʀᴇᴇɴ ᴡᴀs ᴅᴇsɪɢɴᴇᴅ ʙʏ ᴛʜᴏᴍᴀs sᴛᴇᴠᴇɴsᴏɴ (1818 - 1887), ᴀ ʙʀɪᴛɪsʜ ᴄɪᴠɪʟ ᴇɴɢɪɴᴇᴇʀ ᴀɴᴅ ғᴀᴛʜᴇʀ ᴏғ ᴛʜᴇ ᴀᴜᴛʜᴏʀ ʀᴏʙᴇʀᴛ ʟᴏᴜɪs sᴛᴇᴠᴇɴsᴏɴ. ᴀʟʟ sᴄʀᴇᴇɴs sʜᴏᴜʟᴅ ʙᴇ ɪɴsᴛᴀʟʟᴇᴅ sᴏ ᴛʜᴀᴛ ᴛʜᴇ sᴇɴsɪᴛɪᴠᴇ ᴘᴀʀᴛs ᴏғ ᴀʟʟ sᴇɴsᴏʀs ᴀʀᴇ ᴀᴛ ᴛʜᴇ sᴀᴍᴇ ʟᴇᴠᴇʟ, ᴀᴛ 1.5 ᴍᴇᴛᴇʀs ᴀʙᴏᴠᴇ ᴛʜᴇ ɢʀᴏᴜɴᴅ. ᴇxᴄᴇᴘᴛɪᴏɴs ᴛᴏ ᴛʜɪs ᴍᴀʏ ʙᴇ ᴍᴀᴅᴇ ɪɴ ᴀɴ ᴀʀᴇᴀ sᴜʙᴊᴇᴄᴛ ᴛᴏ ᴀᴄᴄᴜᴍᴜʟᴀᴛɪᴏɴs ᴏғ sɴᴏᴡ. ᴛʜᴇ sʜᴇʟᴛᴇʀ sʜᴏᴜʟᴅ ʙᴇ ᴍᴏᴠᴀʙʟᴇ ᴏʀ, ɪғ ᴛʜɪs ɪs ɪᴍᴘʀᴀᴄᴛɪᴄᴀʟ, ʙᴇ ᴍᴏᴜɴᴛᴇᴅ ᴀᴛ ᴀ ʟᴇᴠᴇʟ ᴀʙᴏᴠᴇ ᴛʜᴇ ʜɪɢʜᴇsᴛ ᴇxᴘᴇᴄᴛᴇᴅ ᴀᴄᴄᴜᴍᴜʟᴀᴛɪᴏɴ ᴏғ sɴᴏᴡ ғᴏʀ ᴛʜᴀᴛ ʟᴏᴄᴀᴛɪᴏɴ. ᴍᴇᴛᴇᴏʀᴏʟᴏɢɪᴄᴀʟ sᴄʀᴇᴇɴs ᴛʜᴀᴛ ᴅᴏ ɴᴏᴛ ғɪᴛ ᴛʜᴇ sᴘᴇᴄɪғɪᴄᴀᴛɪᴏɴs ғᴏʀ sᴛᴇᴠᴇɴsᴏɴ sᴄʀᴇᴇɴs (ᴅɪʀᴇᴄᴛʟʏ ᴀʙᴏᴠᴇ) ᴀʀᴇ ɪᴅᴇɴᴛɪғɪᴇᴅ ʙᴇʟᴏᴡ ᴀs ɪɴsᴛʀᴜᴍᴇɴᴛ sʜᴇʟᴛᴇʀs.