Spatiotemporal characteristics of Qinghai Lake ice phenology between 2000 and 2016
Spatiotemporal characteristics of Qinghai Lake ice phenology between 2000 and 2016
复制标题
2000-2016年青海湖冰物候时空特征
DOI：
10.1007/s11442-019-1587-0
复制
发表时间：
2019-01
影响因子：
4.9
通讯作者：
Liu Juan
中科院分区：
文献类型：
--
作者：
Qi Miaomiao;Yao Xiaojun;Li Xiaofeng;Duan Hongyu;Gao Yongpeng;Liu Juan
湖冰物候特征是气候变化的灵敏指示器。利用MOD 09 GQ地表反射率产品、Landsat TM/ETM+影像和气象记录等多源遥感数据，结合RS和GIS技术，分析了青海湖2000 - 2016年冰物候的时空变化特征。我们还确定了影响湖泊冰物候的气候因素，并得出了一些结论。首先，数据表明，青海湖的封冻开始（FUS）、封冻结束（FUE）、解体开始（BUS）和解体结束（BUE）分别发生在12月中旬、1月上旬、3月中下旬和4月上旬。平均冻结时间（FD，FUE和BUE之间）、完全冻结时间（CFD，FUE和BUS之间）、覆冰时间（ICD，FUS和BUE之间）和消融时间（AD，BUS和BUE之间）分别为88天、77天、108天和10天。其次，虽然该分析结果显示，2000年至2016年青海湖的冰物候存在较大差异，但FUS时间的变化相对较小。数据显示，FUE日期也有随时间波动的趋势，最初提前，然后推迟，而BUS日期的情况正好相反，因为这些日期在2012年至2016年之间提前。总体而言，2000-2005年和2010-2016年青海湖FD均呈缩短趋势，且青海湖FD较青藏高原腹地其他湖泊短.第三，青海湖在冻结和融化过程中具有相似的空间分布特征，即冻结较早的湖面也开始融化，这与青藏高原上的其他湖泊明显不同。青海湖冰物候的另一个特征是FU持续时间（18 ~ 31天）比BU持续时间（7 ~ 20天）长约10天。（4）冬半年（10月至次年4月）负积温也是青海湖冰物候变化的主导因子。降水和风速对湖泊冰盖的形成和融化也有直接的影响，也是不可忽视的。
Lake ice phenology is considered a sensitive indicator of regional climate change. We utilized time series information of this kind extracted from a series of multi-source remote sensing (RS) datasets including the MOD09GQ surface reflectance product, Landsat TM/ETM+ images, and meteorological records to analyze spatiotemporal variations of ice phenology of Qinghai Lake between 2000 and 2016 applying both RS and GIS technology. We also identified the climatic factors that have influenced lake ice phenology over time and draw a number of conclusions. First, data show that freeze-up start (FUS), freeze-up end (FUE), break-up start (BUS), and break-up end (BUE) on Qinghai Lake usually occurred in mid-December, early January, mid-to-late March, and early April, respectively. The average freezing duration (FD, between FUE and BUE), complete freezing duration (CFD, between FUE and BUS), ice coverage duration (ICD, between FUS and BUE), and ablation duration (AD, between BUS and BUE) were 88 days, 77 days, 108 days and 10 days, respectively. Second, while the results of this analysis reveal considerable differences in ice phenology on Qinghai Lake between 2000 and 2016, there has been relatively little variation in FUS times. Data show that FUE dates had also tended to fluctuate over time, initially advancing and then being delayed, while the opposite was the case for BUS dates as these advanced between 2012 and 2016. Overall, there was a shortening trend of Qinghai Lake’s FD in two periods, 2000–2005 and 2010–2016, which was shorter than those seen on other lakes within the hinterland of the Tibetan Plateau. Third, Qinghai Lake can be characterized by similar spatial patterns in both freeze-up (FU) and break-up (BU) processes, as parts of the surface which freeze earlier also start to melt first, distinctly different from some other lakes on the Tibetan Plateau. A further feature of Qinghai Lake ice phenology is that FU duration (between 18 days and 31 days) is about 10 days longer than BU duration (between 7 days and 20 days). Fourth, data show that negative temperature accumulated during the winter half year (between October and the following April) also plays a dominant role in ice phenology variations of Qinghai Lake. Precipitation and wind speed both also exert direct influences on the formation and melting of lake ice cover and also cannot be neglected.
登录
查看更多内容
影响因子：
4.9
作者：
Jia Wang;X. Bai;Haoguo Hu;A. Clites;M. Colton;B. Lofgren
通讯作者：
Jia Wang;X. Bai;Haoguo Hu;A. Clites;M. Colton;B. Lofgren
影响因子：
7.4
作者：
A. Choiński;Leszek Kolendowicz;J. Pociask-Karteczka;L. Sobkowiak
通讯作者：
A. Choiński;Leszek Kolendowicz;J. Pociask-Karteczka;L. Sobkowiak
影响因子：
3.2
作者：
Duguay, CR;Prowse, TD;Ménard, P
通讯作者：
Ménard, P
DOI：
10.18307/2005.0413
发表时间：
2005
期刊：
Journal of Lake Science
影响因子：
--
作者：
Yin Qing-jun;Yang Yinglian
通讯作者：
Yin Qing-jun;Yang Yinglian
影响因子：
13.5
作者：
B. Reed;M. Budde;Page Spencer;Amy E. Miller
通讯作者：
B. Reed;M. Budde;Page Spencer;Amy E. Miller