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E, (2 + dz) Ex (2 + dz) dz Unit CTOSS- sectional area I TE1 (2) E (2) N Earth's surface (z = 0) Figure 4.7. Flux divergence of radiation through an infinitesimal layer of air of thickness dz and unit cross-sectional area located at height z above the Earth's surface. EN -0.05 10.1 1 0.2 z (LINEAR SCALE) , E 11.0 z 2.0 3.0 -5.0 TTTT LINEAR SCALE Figure 4.6. Schematic of the variations of Exp, and dE/dz with height z in isothermal and well mixed atmosphere. E, (2+dz) E2 (2+ dz) Exercise 4.3. Express dT/dt in terms of dE.(p), dp, and the dry adiabatic temperate lapse rate ral=-(dT/dz) for dry parcels of air moving around in the atmosphere under adiabatic conditions), where p is the atmospheric pressure at height z above the Earths P surface