Driving mechanisms of gross primary productivity geographical patterns for Qinghai–Tibet Plateau lake systems

2021 ◽  
pp. 148286
Author(s):  
Junjie Jia ◽  
Yafeng Wang ◽  
Yao Lu ◽  
Kun Sun ◽  
Sidan Lyn ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Gross Primary Productivity ◽  
Tibet Plateau ◽  
Geographical Patterns ◽  
Driving Mechanisms ◽  
Plateau Lake ◽  
Lake Systems ◽  
Qinghai Tibet Plateau

scholarly journals Evaluation of Lacustrine Groundwater Discharge, Hydrologic Partitioning, and Nutrient Budgets in a Proglacial Lake in Qinghai-Tibet Plateau: Using <sup>222</sup>Rn and Stable Isotopes

2018 ◽  
Author(s):  
Xin Luo ◽  
Xing Xing Kuang ◽  
Jiu Jimmy Jiao ◽  
Sihai Liang ◽  
Rong Mao ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Primary Productivity ◽  
Nutrient Loading ◽  
Groundwater Discharge ◽  
Tibet Plateau ◽  
Nutrient Budgets ◽  
Proglacial Lakes ◽  
Proglacial Lake ◽  
Qinghai Tibet Plateau ◽  
Hydrologic Partitioning

Abstract. Proglacial lakes are good natural laboratories to investigate groundwater and glacier dynamics under current climate condition and to explore primary productivity under pristine lake status. This study conducted a series of investigations of 222Rn, stable isotopes, nutrients and other hydrogeochemical parameters in Ximen Co Lake, a remote proglacial lake in the east of Qinghai-Tibet Plateau (QTP). A radon mass balance model was used to quantify the lacustrine groundwater discharge (LGD) of the lake, leading to an LGD estimate of 10.3 ± 8.2 mm d−1. Based on the three end member models of stable 18O and Cl−, the hydrologic partitioning of the lake is obtained, which shows that groundwater discharge only accounts for 7.0 % of the total water input. The groundwater derived DIN and DIP loadings constitute 42.9 % and 5.5 % of the total nutrient loading to the lakes, indicating the significance of LGD in delivering disproportionate DIN into the lake. The primary productivity of the lake water is calculated to be 0.41 mmol C m−2 d−1. This study presents the first attempts to evaluate the LGD and hydrologic partitioning in the glacial lake by coupling radioactive and stable isotopic approaches and the findings advance the understanding of nutrient budgets and primary productivity in the proglacial lakes of QTP. The study is also instructional in revealing the hydrogeochemical processes in proglacial lakes elsewhere.

The response of net primary productivity of two different vegetation types to climatic factors and root turnover analysis on the Qinghai-Tibet Plateau

2019 ◽  
Vol 39 (14) ◽  
Author(s):  
戴黎聪 DAI Licong ◽  
郭小伟 GUO Xiaowei ◽  
张法伟 ZHANG Fawei ◽  
柯浔 KE Xun ◽  
曹莹芳 CAO Yingfang ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Climatic Factors ◽  
Tibet Plateau ◽  
Root Turnover ◽  
Vegetation Types ◽  
Qinghai Tibet Plateau

An improved Biome-BGC model for estimating net primary productivity of alpine meadow on the Qinghai-Tibet Plateau

2017 ◽  
Vol 350 ◽  
pp. 55-68 ◽  
Author(s):  
Qingling Sun ◽  
Baolin Li ◽  
Tao Zhang ◽  
Yecheng Yuan ◽  
Xizhang Gao ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Alpine Meadow ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

scholarly journals Drought-Induced Reduction in Net Primary Productivity across Mainland China from 1982 to 2015

2018 ◽  
Vol 10 (9) ◽  
pp. 1433 ◽  
Author(s):  
Chengguang Lai ◽  
Jun Li ◽  
Zhaoli Wang ◽  
Xiaoqing Wu ◽  
Zhaoyang Zeng ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Net Primary Productivity ◽  
Mainland China ◽  
Terrestrial Ecosystems ◽  
Northern China ◽  
Tibet Plateau ◽  
Positive Correlation ◽  
Casa Model ◽  
Increasing Trend ◽  
Qinghai Tibet Plateau

Terrestrial net primary productivity (NPP) plays an essential role in the global carbon cycle as well as for climate change. However, in the past three decades, terrestrial ecosystems across mainland China suffered from frequent drought and, to date, the adverse impacts on NPP remain uncertain. This study explored the spatiotemporal features of NPP and discussed the influences of drought on NPP across mainland China from 1982 to 2015 using the Carnegie Ames Stanford Application (CASA) model and the standardized precipitation evapotranspiration index (SPEI). The obtained results indicate that: (1) The total annual NPP across mainland China showed an non-significantly increasing trend from 1982 to 2015, with annual increase of 0.025 Pg C; the spring NPP exhibited a significant increasing trend (0.031 Pg C year−1, p < 0.05) while the summer NPP showed a higher decreasing trend (0.019 Pg C year−1). (2) Most areas of mainland China were spatially dominated by a positive correlation between annual NPP and SPEI and a significant positive correlation was mainly observed for Northern China; specific to the nine sub-regions, annual NPP and SPEI shared similar temporal patterns with a significant positive relation in Northeastern China, Huang-Huai-Hai, Inner Mongolia, and the Gan-Xin Region. (3) During the five typical drought events, more than 23% areas of mainland China experienced drought ravage; the drought events generally caused about 30% of the NPP reduction in most of the sub-regions while the NPP in the Qinghai-Tibet Plateau Region generally decreased by about 10%.

Modeling gross primary productivity of alpine meadow in the northern Tibet Plateau by using MODIS images and climate data

2010 ◽  
Vol 30 (5) ◽  
pp. 264-269 ◽  
Author(s):  
Gang Fu ◽  
Zhenxi Shen ◽  
Xianzhou Zhang ◽  
Songcai You ◽  
Jianshuang Wu ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Alpine Meadow ◽  
Gross Primary Productivity ◽  
Tibet Plateau ◽  
Climate Data ◽  
Northern Tibet
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