Horizontal Variations of Nocturnal Temperature and Turbulence Over Microtopography

Abstract Nocturnal spatial variation of temperature, wind, and turbulence over microtopography is generally poorly understood. Low amplitude covers much the Earth’s surface and, with very stable conditions, can produce significant variations temperature turbulence. We examine such gentle terrain that include two shallow gullies feed into a small valley. The are covered by sub-network seven flux stations embedded within larger network measurements indicate only 2–5-m depth 100-m width often lead to several kelvin or more. Such depend on ambient wind speed direction near-surface stratification. investigate surprising importance microscale lee occurring slopes 5%. Near-surface stratification unexpectedly tends increase elevation slopes. potential causes this puzzling behaviour