Ecosystem-dynamics link to hydrologic variations for different land-cover types

Minha Choi; Qiaozhen Mu; Hyunglok Kim; Kyotaek Hwang; Jiwon Hur

doi:10.3319/TAO.2016.09.13.01

Ecosystem-dynamics link to hydrologic variations for different land-cover types

Minha Choi, Qiaozhen Mu, Hyunglok Kim, Kyotaek Hwang, Jiwon Hur

Graduate School of Water Resources

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The influence of soil moisture and evapotranspiration (ET) on ecosystem dynamics has been studied only in a limited way owing to a lack of large-scale measurements. In this study, the Normalized Difference Vegetation Index (NDVI) data retrieved by using the Moderate Resolution Imaging Spectroradiometer (MODIS) was successfully used to identify ecological relationships that involve soil moisture and ET at 132 sites located in different continents of the world. Optimal relationships exist between NDVI and soil moisture within time lags of 10 days at forest and grassland sites, and of 25 days at cropland and shrubland sites. The ecological correlations between NDVI and the hydrologic variables are affected mainly by the land-cover type. The densely vegetated areas show shorter time lags for NDVI to ET owing to canopy evaporation and plant transpiration which are almost simultaneous with NDVI.

Original language	English
Pages (from-to)	437-462
Number of pages	26
Journal	Terrestrial, Atmospheric and Oceanic Sciences
Volume	28
Issue number	3
DOIs	https://doi.org/10.3319/TAO.2016.09.13.01
State	Published - Jun 2017

Keywords

Evapotranspiration
Hydrological variables
NDVI
Soil moisture
Time lags
Vegetation variability

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10.3319/TAO.2016.09.13.01

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title = "Ecosystem-dynamics link to hydrologic variations for different land-cover types",

abstract = "The influence of soil moisture and evapotranspiration (ET) on ecosystem dynamics has been studied only in a limited way owing to a lack of large-scale measurements. In this study, the Normalized Difference Vegetation Index (NDVI) data retrieved by using the Moderate Resolution Imaging Spectroradiometer (MODIS) was successfully used to identify ecological relationships that involve soil moisture and ET at 132 sites located in different continents of the world. Optimal relationships exist between NDVI and soil moisture within time lags of 10 days at forest and grassland sites, and of 25 days at cropland and shrubland sites. The ecological correlations between NDVI and the hydrologic variables are affected mainly by the land-cover type. The densely vegetated areas show shorter time lags for NDVI to ET owing to canopy evaporation and plant transpiration which are almost simultaneous with NDVI.",

keywords = "Evapotranspiration, Hydrological variables, NDVI, Soil moisture, Time lags, Vegetation variability",

author = "Minha Choi and Qiaozhen Mu and Hyunglok Kim and Kyotaek Hwang and Jiwon Hur",

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T1 - Ecosystem-dynamics link to hydrologic variations for different land-cover types

AU - Choi, Minha

AU - Mu, Qiaozhen

AU - Kim, Hyunglok

AU - Hwang, Kyotaek

AU - Hur, Jiwon

PY - 2017/6

Y1 - 2017/6

N2 - The influence of soil moisture and evapotranspiration (ET) on ecosystem dynamics has been studied only in a limited way owing to a lack of large-scale measurements. In this study, the Normalized Difference Vegetation Index (NDVI) data retrieved by using the Moderate Resolution Imaging Spectroradiometer (MODIS) was successfully used to identify ecological relationships that involve soil moisture and ET at 132 sites located in different continents of the world. Optimal relationships exist between NDVI and soil moisture within time lags of 10 days at forest and grassland sites, and of 25 days at cropland and shrubland sites. The ecological correlations between NDVI and the hydrologic variables are affected mainly by the land-cover type. The densely vegetated areas show shorter time lags for NDVI to ET owing to canopy evaporation and plant transpiration which are almost simultaneous with NDVI.

AB - The influence of soil moisture and evapotranspiration (ET) on ecosystem dynamics has been studied only in a limited way owing to a lack of large-scale measurements. In this study, the Normalized Difference Vegetation Index (NDVI) data retrieved by using the Moderate Resolution Imaging Spectroradiometer (MODIS) was successfully used to identify ecological relationships that involve soil moisture and ET at 132 sites located in different continents of the world. Optimal relationships exist between NDVI and soil moisture within time lags of 10 days at forest and grassland sites, and of 25 days at cropland and shrubland sites. The ecological correlations between NDVI and the hydrologic variables are affected mainly by the land-cover type. The densely vegetated areas show shorter time lags for NDVI to ET owing to canopy evaporation and plant transpiration which are almost simultaneous with NDVI.

KW - Evapotranspiration

KW - Hydrological variables

KW - NDVI

KW - Soil moisture

KW - Time lags

KW - Vegetation variability

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DO - 10.3319/TAO.2016.09.13.01

M3 - Article

AN - SCOPUS:85019716777

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VL - 28

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JO - Terrestrial, Atmospheric and Oceanic Sciences

JF - Terrestrial, Atmospheric and Oceanic Sciences

IS - 3

ER -

Ecosystem-dynamics link to hydrologic variations for different land-cover types

Abstract

Keywords

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