کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
81994 158366 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ten-year evapotranspiration estimates in a Bornean tropical rainforest
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Ten-year evapotranspiration estimates in a Bornean tropical rainforest
چکیده انگلیسی

This study was undertaken to quantify interannual variations of total evaporation (ET) in a tropical rainforest in Sarawak, Malaysia. To this end, we conducted 10-year meteorological measurements and formulated a simplified big-leaf model that reproduces transpiration (Et), rainfall interception (Ei), and ET as the sum of these. The model was validated independently using eddy covariance fluxes, rainfall interception based on throughfall and stemflow measurements, and sap flow measurements conducted for more than 2 years. Using the model, Et, Ei, and ET were estimated for the period 2000–2009. Annual Et, Ei, and ET averaged over 10 years were estimated as 1114, 209, and 1323 mm, respectively, with small seasonal fluctuations. The derived estimates showed conservative year-to-year variations in annual Et, Ei, and ET (CV = 5–7%) in contrast to considerable year-to-year variations in annual rainfall (CV = 11%). Specific rainfall characteristics (e.g. intense short duration storms) at this site can explain the conservative year-to-year Ei variations. Small interannual variations in meteorological conditions and absence of severe drought during the study period can explain the small year-to-year Et variations. To characterize ET at our site, we also compared Ei and ET at our site with those of other tropical forests. Based on the derived ET characteristics, we discuss possible ET changes in response to changes in rainfall regime at this site.


► Much attention is now being paid to spatial-temporal total evaporation (ET) changes in tropical rainforests.
► Our question in this paper was “What are the interannual variations in ET in a Southeast Asian tropical rainforest?”
► To answer this question, we estimated approximately 10 years of ET in a Bornean tropical rainforest.
► Further, our study compared ET with that in 138 other tropical forests.
► The derived ET characteristics based on 10 years of data enable us to understand tropical ET responses to potential climate changes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural and Forest Meteorology - Volume 151, Issue 9, 15 September 2011, Pages 1183–1192
نویسندگان
, , , , , , , ,