The influence of the depth of a very shallow cool-pool lake on nocturnal cooling

摘要: Abstract Cold air pools (CAPs) may develop during nights in very shallow depressions. The depth of the stagnant within a CAP influences process cooling nocturnal and resulting minimum temperature. A seven-month long field experiment was performed winter 2013/2014 an orchard near Krsko, Slovenia, located inside basin only few metres deep approximately 500 m wide. Two locations at different elevations were selected for measurement. results showed that (in terms cooling) can be classified into three main categories; with overcast skies weak cooling, windy clear sky strong but no difference temperatures between basin, calm even stronger significant temperature differences basin. On skies, two measuring sites up to 5 °C presence winds cause sufficient turbulent mixing negate any To better understand on calm, nights, we developed simple 1-D thermodynamic conceptual model focusing CAP. has 5-layers (including layers representing CAP), analytical solution obtained equilibrium temperatures. Sensitivity analysis performed. As expected, larger soil heat conductivity or higher ground increases morning An increase atmosphere also simulated temperatures, while lower remains almost same. humidity modelled free strongly influence locations. more humid air, location compared location.