2001年至2015年格陵兰岛西海岸和东海岸的植被物候梯度

Vegetation phenology gradients along the west and east coasts of Greenland from 2001 to 2015.

作者信息

Karami Mojtaba, Hansen Birger Ulf, Westergaard-Nielsen Andreas, Abermann Jakob, Lund Magnus, Schmidt Niels Martin, Elberling Bo

机构信息

Department of Geosciences and Natural Resource Management, Center for Permafrost (CENPERM), University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen K, Denmark.

Asiaq, Greenland Survey, Qatserisut 8, 3900, Nuuk, Greenland.

出版信息

Ambio. 2017 Feb;46(Suppl 1):94-105. doi: 10.1007/s13280-016-0866-6.

DOI:10.1007/s13280-016-0866-6

PMID:28116689

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5258659/

Abstract

The objective of this paper is to characterize the spatiotemporal variations of vegetation phenology along latitudinal and altitudinal gradients in Greenland, and to examine local and regional climatic drivers. Time-series from the Moderate Resolution Imaging Spectroradiometer (MODIS) were analyzed to obtain various phenological metrics for the period 2001-2015. MODIS-derived land surface temperatures were corrected for the sampling biases caused by cloud cover. Results indicate significant differences between West and East Greenland, in terms of both observed phenology during the study period, as well as the climatic response. The date of the start of season (SOS) was significantly earlier (24 days), length of season longer (25 days), and time-integrated NDVI higher in West Greenland. The sea ice concentration during May was found to have a significant effect on the date of the SOS only in West Greenland, with the strongest linkage detected in mid-western parts of Greenland.

摘要

本文的目的是描述格陵兰岛植被物候沿纬度和海拔梯度的时空变化，并研究当地和区域气候驱动因素。分析了来自中分辨率成像光谱仪（MODIS）的时间序列，以获取2001 - 2015年期间的各种物候指标。对MODIS得出的陆地表面温度进行了校正，以消除云覆盖造成的采样偏差。结果表明，在研究期间观测到的物候以及气候响应方面，西格陵兰岛和东格陵兰岛之间存在显著差异。西格陵兰岛的季节开始日期（SOS）显著更早（提前24天），季节长度更长（长25天），且时间积分归一化植被指数（NDVI）更高。发现仅在西格陵兰岛，5月份的海冰浓度对SOS日期有显著影响，在格陵兰岛中西部地区检测到最强的联系。