[1]SONG Jia,XU Changchun,YANG Yuanyuan,et al.Temporal and Spatial Variation Characteristics of Evapotranspiration and Dry-Wet Climate in Xinjiang Based on MODIS16[J].Research of Soil and Water Conservation,2019,26(05):210-214,221.
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Temporal and Spatial Variation Characteristics of Evapotranspiration and Dry-Wet Climate in Xinjiang Based on MODIS16
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 05
Page number:
210-214,221
Column:
Public date:
2019-09-06
- Title:
- Temporal and Spatial Variation Characteristics of Evapotranspiration and Dry-Wet Climate in Xinjiang Based on MODIS16
- Keywords:
- MOD16; evapotranspiration; humid index; temporal and spatial variation
- CLC:
- P467
- DOI:
- -
- Abstract:
- In order to study the distribution and change of evapotranspiration and wetting index in Xinjiang, we use daily ground observation data of 52 meteorological stations and MOD16 product data in Xinjiang during the period 2000-2013. The characteristics of dry and wet conditions in Xinjiang were comprehensively analyzed by means of linear regression, tilt rate, coefficient of variation, Hurst index and wetting index from the aspects of evapotranspiration and wetting index. The results show that:(1) the spatial distribution of annual average evapotranspiration in Xinjiang is mainly between 40 mm and 830 mm; most of the ET high-value areas are located near the Ili Valley and the Irtysh Valley, and the average value of ET in the stations varies from 178.29 to 214.87 mm; the average annual ET is 197.49 mm, and the average value of PET varies from 1 297.12 to 1 447.48 mm, and the average annual PET is 1 374.39 mm; (2) the distribution of ET slope rate in Xinjiang has a slightly reducing trend; (3) overall, the climate in Xinjiang has tended to be wet in recent 14 years; among the meteorological factors, precipitation and relative humidity are significantly positively correlated with the wetting index, and the temperature is significantly negatively correlated with the wetting index.
- References:
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1900-01-01