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Variability in Snow Cover Phenology in China from 1952 to 2010 : Volume 12, Issue 4 (30/04/2015)

By Ke, C. Q.

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Book Id: WPLBN0004012343
Format Type: PDF Article :
File Size: Pages 36
Reproduction Date: 2015

Title: Variability in Snow Cover Phenology in China from 1952 to 2010 : Volume 12, Issue 4 (30/04/2015)  
Author: Ke, C. Q.
Volume: Vol. 12, Issue 4
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Li, X. C., Xie, H., Liu, X., Kou, C., & Ke, C. Q. (2015). Variability in Snow Cover Phenology in China from 1952 to 2010 : Volume 12, Issue 4 (30/04/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210023, China. Daily snow observation data from 672 stations, particularly the 352 stations with over ten annual mean snow cover days (SCD), during 1952–2010 in China, are used in this study. We first examine spatiotemporal variations and trends of SCD, snow cover onset date (SCOD), and snow cover end date (SCED). We then investigate SCD relationships with number of days with temperature below 0 °C (TBZD), mean air temperature (MAT), and Arctic Oscillation (AO) index, the latter two being constrained to the snow season of each snow year. The results indicate that the heavy-snow years for the entire country include 1955, 1957, 1964, and 2010, and light-snow years include 1953, 1965, 1999, 2002, and 2009. The reduced TBZD and increased MAT are the main reasons for the overall delay of SCOD and advance of SCED since 1952, although it is not necessary for one station to experience both significantly delayed SCOD and early SCED. This explains why only 15% of the stations show significant shortening of SCD, while 75% of the stations show no significant change in the SCD trends. This differs with the overall shortening of the snow period in the Northern Hemisphere previously reported. Our analyses indicate that the SCD distribution pattern and trends in China are very complex and are not controlled by any single climate variable examined (i.e. TBZD, MAT, or AO), but a combination of multiple variables. It is found that the AO index has the maximum impact on the SCD shortening trends in Shandong Peninsula, Changbai Mountains, and North Xinjiang, while the combined TBZD and MAT have the maximum impact on the SCD shortening trends in the Loess Plateau, Xiaoxingganling, and Sanjiang Plain.

Summary
Variability in snow cover phenology in China from 1952 to 2010

Excerpt
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