a) How are wind speeds different over land than over water?
b) Visit different layers of the atmosphere. In which atmospheric layer are winds the fastest? Why might this be true?
atmospheric pressure corresponds roughly to altitude several pressure layers are meteorologically interesting they show data assuming the earth is completely smooth note: 1 hectopascal ( hPa ) = 1 milibar (mb)
\[
\begin{array}{r|l}
1000 \mathrm{hPa} & \sim 100 \mathrm{~m} \text {, near sea level conditions } \\
850 \mathrm{hPa} & \sim 1,500 \mathrm{~m} \text {, planetary boundary, low } \\
700 \mathrm{hPa} & \sim 3,500 \mathrm{~m} \text {, planetary boundary, high } \\
500 \mathrm{hPa} & \sim 5,000 \mathrm{~m} \text {, vorticity } \\
250 \mathrm{hPa} & \sim 10,500 \mathrm{~m} \text {, jet stream } \\
70 \mathrm{hPa} & \sim 17,500 \mathrm{~m} \text {, stratosphere } \\
10 \mathrm{hPa} & \sim 26,500 \mathrm{~m} \text {, even more stratosphere }
\end{array}
\]
the "Surface" layer represents conditions at ground or water level this layer follows the contours of mountains, valleys, etc.
