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Title: Asymmetric daytime and nighttime surface temperature feedback induced by crop greening across Northeast China

Journal Article · · Agricultural and Forest Meteorology
 [1];  [2];  [1];  [1];  [1];  [3];  [1];  [1]
  1. Chinese Academy of Sciences (CAS), Changchun (China)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Chinese Academy of Sciences (CAS), Changchun (China); Changchun Normal Univ. (China)

Mid-high latitude Northeast China witnessed significant crop greening from 2001 to 2020, as evidenced by satellite records and field observations. The land surface temperature of croplands during the growing season showed a decreasing trend, suggesting negative surface temperature feedback to crop greening of agricultural ecosystems in mid-high latitude Northeast China. Here, using time-series remote sensing products and long-term scenario simulations, the present study highlights that crop greening can slow climate warming. Our study noted a stronger surface cooling effect induced by crop greening during the growing season in the day than at the night, which contributed to asymmetric diurnal temperature cycle changes in Northeast China. In addition, our biophysical mechanism analysis revealed aerodynamic and surface resistances as the major driving factors for the daytime land surface temperature (LST) cooling effect induced by crop greening, while the ground heat flux and ambient temperature feedback as the major attributes of the nighttime LST cooling impact due to crop greening.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences
Grant/Contract Number:
AC05-76RL01830; XDA28080503; 42071025; 2022CXTD02
OSTI ID:
1889456
Report Number(s):
PNNL-SA-176920
Journal Information:
Agricultural and Forest Meteorology, Vol. 325; ISSN 0168-1923
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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