Abstract

Authors

TAKANASHI Satoru, KOSUGI Yoshiko, OHKUBO Shinjiro, MATSUO Naoko, TANI Makoto, Abdul Rahim Nik

Year

2010

Title

Water and heat fluxes above a lowland dipterocarp forest in Peninsular Malaysia

Journal

Hydrological Processes

Volume

24(4)

Page

472 - 480

DOI

doi:10.1002/hyp.7499

Keywords

tropical rainforest, eddy covariance, evapotranspiration, energy balance, Southeast Asia

URL

http://www3.interscience.wiley.com/journal/122672781/abstract

Abstract

We measured the fluxes of sensible and latent heat between a low-land dipterocarp forest in Peninsular Malaysia and the atmosphere. No clear seasonal or interannual changes in latent heat flux were found from 2003 to 2005, while sensible heat flux sometimes fluctuated depending on the fluctuation of incoming radiation between wet and dry seasons. The evapotranspiration rates averaged for the period between 2003 and 2005 were 2・77 and 3・61 mm day-1 using eddy covariance data without and with an energy balance correction, respectively. Average precipitation was 4・74 mm day-1. Midday surface conductance decreased with an increasing atmospheric water vapour pressure deficit and thus restricted the excess water loss on sunny days in the dry season. However, the relationship between the surface conductance and vapour pressure deficit did not significantly decline with an increase in volumetric soil water content even during a period of extremely low rainfall.

Site

PSO

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