Divergence in Autumn Phenology Extracted From Different Satellite Proxies Reveals the Timetable of Leaf Senescence Over Deciduous Forests

被引：0

作者：

Wang, Cong ^{[1
]}

Yang, Yajie ^{[2
]}

Yin, Gaofei ^{[2
]}

Xie, Qiaoyun ^{[3
]}

Xu, Baodong ^{[4
]}

Verger, Aleixandre ^{[5
,6
,7
]}

Descals, Adria ^{[6
,7
]}

Filella, Iolanda ^{[6
,7
]}

Penuelas, Josep ^{[6
,7
]}

机构：

[1] Cent China Normal Univ, Sch Urban & Environm Sci, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan, Peoples R China

[2] Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu, Peoples R China

[3] Univ Western Australia, Sch Engn, Perth, WA, Australia

[4] Huazhong Agr Univ, Macro Agr Res Inst, Coll Resource & Environm, Wuhan, Peoples R China

[5] CSIC UV GV, CIDE, Valencia, Spain

[6] CREAF, Barcelona, Spain

[7] CSIC, Global Ecol Unit CREAF CSIC UAB, Barcelona, Spain

来源：

GEOPHYSICAL RESEARCH LETTERS | 2024年 / 51卷 / 04期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

SOUTHERN-OCEAN; ATMOSPHERIC CO2; OVERTURNING CIRCULATION; SURFACE NITRATE; PACIFIC; NITROGEN; CHILE; IRON; WESTERLIES; LIMITATION;

D O I：

10.1029/2023GL107346

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Remote sensing detection of autumn phenology is challenging and highly uncertain, as exemplified by the observed divergence in autumn phenology extracted from different proxies. Here, we compared the autumn phenology derived from Solar-Induced chlorophyll Fluorescence (SIF), Chlorophyll/Carotenoid Index (CCI), Enhanced Vegetation Index (EVI), and Normalized Difference Vegetation Index (NDVI) over deciduous forest sites. We observed a clear temporal sequence in the derived autumn phenology from various proxies: SIF < CCI < EVI < NDVI. Comparison with field measurements supported that SIF, EVI, and NDVI can successfully capture the attenuation of photosynthetic activity, leaf coloration, and leaf fall, respectively. The sequence among the autumn phenology derived from those proxies was also consistent with their responses to climate cues, where SIF had the highest partial correlation coefficient to solar radiation in autumn, followed by CCI, EVI, and NDVI, while NDVI was more correlated with temperature, followed by EVI, CCI, and SIF.

引用

页数：11