Evaluation of Land Surface Phenology in Northern Hemisphere Permafrost Regions

被引:0
|
作者
Zhao, Yaohua [1 ]
Peng, Xiaoqing [1 ,2 ]
Frauenfeld, Oliver W. [3 ]
Cui, Xia [1 ]
Bi, Jian [1 ]
Ma, Xuanlong [1 ]
Wei, Gang [1 ]
Mu, Cuicui [1 ,2 ]
Sun, Hao [4 ]
Sui, Jia [4 ]
机构
[1] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Peoples R China
[2] Lanzhou Univ, Observat & Res Stn Ecoenvironm Frozen Ground Qilia, Lanzhou, Peoples R China
[3] Texas A&M Univ, Dept Geog, College Stn, TX USA
[4] Qinghai Prov Geol Disaster Prevent & Control Tech, Qinghai Prov Gen Geol & Environm Monitoring Stn, Xining, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
land surface phenology; cold region ecology; remote sensing; permafrost regions; ENHANCED VEGETATION INDEX; DELAYED SPRING PHENOLOGY; GREEN-UP DATES; TIBETAN PLATEAU; TIME-SERIES; TEMPORAL RESOLUTION; HIGH-LATITUDES; SNOW COVER; NDVI DATA; MODIS;
D O I
10.1029/2023JG007951
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Vegetation phenology interacts strongly with climate through the exchange of carbon, water, momentum, and energy between terrestrial ecosystem and atmosphere. These vegetation dynamics in Northern Hemisphere permafrost regions have substantial uncertainties in previous studies, partly due to differences in datasets. Thus, reliable land surface phenology (LSP) retrievals are crucial for understanding the effects of climate change on ecosystems and biosphere-atmosphere-hydrosphere interactions. We assessed various LSP datasets at different spatial resolutions for 2001-2014, generated by different methods based on different satellite observations. We also assessed the accuracy of LSP by comparing with CO2 flux phenology. For start of growing season (SOS), the comprehensive evaluation indicated MODIS phenology showed better consistency and higher accuracy with flux-derived phenology observations (R = 0.54, RMSE = 36.2 days, bias<5 days). For end of growing season (EOS), we cannot conclusively determine which LSP performs best. In the Northern Hemisphere permafrost regions, SOS occurred at 100-150 days (April-May), and EOS occurred at 260-320 days (September-November). During 2001-2014, SOS occurred earlier by 0.33 +/- 0.30 days/yr. Significant trends were observed for 6.4%-27.6% of pixels, averaging -1.30 +/- 1.16 days/yr. EOS occurred earlier by 0.25 +/- 0.43 days/yr, with significant trends averaging -0.52 +/- 0.94 days/yr. Among LSPs, variability in EOS trends was significant, with even the direction of trends differing. This study may provide insights into LSP data selection and further understanding of vegetation dynamics and its mechanisms in permafrost regions.
引用
收藏
页数:24
相关论文
共 50 条
  • [41] Land Surface Temperature Sensitivity to Changes in Vegetation Phenology Over Northern Deciduous Forests
    Park, Chang-Eui
    Jeong, Sujong
    JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2023, 128 (12)
  • [42] The covariation of Northern Hemisphere summertime CO2 with surface temperature in boreal regions
    Wunch, D.
    Wennberg, P. O.
    Messerschmidt, J.
    Parazoo, N. C.
    Toon, G. C.
    Deutscher, N. M.
    Keppel-Aleks, G.
    Roehl, C. M.
    Randerson, J. T.
    Warneke, T.
    Notholt, J.
    ATMOSPHERIC CHEMISTRY AND PHYSICS, 2013, 13 (18) : 9447 - 9459
  • [43] Modeling and predicting spring land surface phenology of the deciduous broadleaf forest in northern China
    Luo, Xiangzhong
    Chen, Xiaoqiu
    Wang, Lingxiao
    Xu, Lin
    Tian, Youhua
    AGRICULTURAL AND FOREST METEOROLOGY, 2014, 198 : 33 - 41
  • [45] Land use Changes and Northern Hemisphere Cooling
    Govindasamy, B
    Duffy, PB
    Caldeira, K
    GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (02) : 291 - 294
  • [46] Regional changes of surface air temperature annual cycle in the Northern Hemisphere land areas
    Deng, Qimin
    Fu, Zuntao
    INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2023, 43 (05) : 2238 - 2249
  • [47] Statistics and characteristics of permafrost and ground-ice distribution in the Northern Hemisphere
    Zhang, T.
    Barry, R.
    Knowles, K.
    Heginbottom, J.
    Brown, J.
    POLAR GEOGRAPHY, 2008, 31 (1-2) : 47 - 68
  • [48] Permafrost Degradation Induces the Abrupt Changes of Vegetation NDVI in the Northern Hemisphere
    Yang, Yanpeng
    Wang, Xufeng
    Wang, Tonghong
    EARTHS FUTURE, 2024, 12 (10)
  • [49] Temperature trends in the permafrost of the Northern Hemisphere: Comparison of model calculations with observations
    Arzhanov, M. M.
    Mokhov, I. I.
    DOKLADY EARTH SCIENCES, 2013, 449 (01) : 319 - 323
  • [50] Attributing observed permafrost warming in the northern hemisphere to anthropogenic climate change
    Gudmundsson, Lukas
    Kirchner, Josefine
    Gaedeke, Anne
    Noetzli, Jeannette
    Biskaborn, Boris K.
    ENVIRONMENTAL RESEARCH LETTERS, 2022, 17 (09)