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Transient land breeze: Eclipse induced wind flow modifications-Observations over plant canopy

Murthy, BS and Latha, R and Sreeja, P and Dharmaraj, T (2013) Transient land breeze: Eclipse induced wind flow modifications-Observations over plant canopy. Journal of Atmospheric and Solar-Terrestrial Physics, 89 (1). pp. 33-39.

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Abstract

An experiment is conducted over Cassava plant canopy at a coastal station at CTCRI, Thiruvananthapuram (8°29'N, 76°59E) to study the response of meteorological parameters and land-sea breeze circulations to the annular solar eclipse on January 15, 2010. Observations reveal decrease of solar radiation to a minimum of 96 W m-2 during the peak eclipse period. Air temperature drops by 4 °C and relative humidity increases by 20. Sensible heat flux reduces to zero. Transient land breeze occurs for a few minutes with a time lag of about 1 h possibly due to outflow from the umbra region or temperature gradient over land with the eclipse progressing in the eastward direction. Sea breeze is delayed by about 3 h on the next day of eclipse. Spectral energy density of wind (u, v, w) and temperature attains a minimum value during totality and increases later, attributable to reduction in turbulence due to eclipse-induced stability.

Item Type: Article
Additional Information: Copyright of this article belongs to Elsevier.
Uncontrolled Keywords: Air temperature; Eclipse periods; Land breezes; Meteorological parameters; Sea breeze; Sensible heat flux; Spectral energy density; Wind spectrum, Heat flux; Sun; Turbulence, Wind effects
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 10 Jun 2014 07:14
Last Modified: 10 Jun 2014 07:14
URI: http://moeseprints.incois.gov.in/id/eprint/401

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