3.26 a hurricane with a central pressure of 940 hpa is surrounded by a region with a pressure of 1010 hpa. the storm is located over an ocean region. at 200 hpa the depression in the pressure field vanishes (i. e., the 200-hpa surface is perfectly flat). estimate the average temperature difference between the center of the hurricane and its surroundings in the layer between the surface and 200 hpa. assume that the mean temperature of this layer outside the hurricane is -3 °c and ignore the virtual temperature correction.

Ageologist is working in an area with exposed sedimentary rocks and finds a well exposed sequence of stratified rocks. as he works through a thick sequence of limestone, he sees abundant large clam fossils that produce an interlocking texture suggesting a reef, but within the limestone section these clams disappear and the overlying limestone is made up primarily of fragments of corals. he now moves 50 km away and finds limestones interbedded with shales, and the limestones contain the same clam fossils he had seen previously 50 km away. as he continues through this section, the rocks become entirely limestone, and the clams disappear again with coral fossils above forming a reef structure. he concludes