A global-drive analysis of ecosystem respiration in the Arctic and Third Pole

Ma, Xiaoliang; He, Panxing; Zeng, Yiyan; Ma, Jun; Wu, Xiaodong

doi:10.1016/j.ecolind.2022.109668

Cited by 5 publications

(3 citation statements)

References 64 publications

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“…Compared to precipitation, temperature was the primary climatic driving factor of the ER in most alpine grasslands on the QTP (Figure 6d), as temperature acted as the primary limiting factor for ER on the cold QTP [55,56,65]. The influence of temperature on GPP and NEP had relatively higher spatial heterogeneity (Figure 6b,d,f).…”

Section: Climate-driven Mechanisms Of the Carbon Budgetmentioning

confidence: 99%

“…However, some other studies have reported that increasing temperature exerted complex effects on the NPP and that precipitation is the primary driving force behind the changes in the AG QTP [7,17,54]. In contrast to GPP, the ER of the AG QTP is primarily driven by temperature, and previous studies have consistently demonstrated this [24,55,56]. In contrast, there is a high level of inconsistency in previous studies regarding the climate-driven mechanism of NEP.…”

Section: Climate-driven Mechanisms Of the Carbon Budgetmentioning

confidence: 99%

“…Therefore, precipitation variation determined the carbon uptake and sequestration dynamics of the AG QTP by altering photosynthesis and soil nutrients. The impact of precipitation on ER is relatively complex [56,63]. The ER was tightly coupled to the photosynthetic rate [64], indicating that precipitation can increase ER through increasing photosynthesis.…”

Section: Climate-driven Mechanisms Of the Carbon Budgetmentioning

confidence: 99%

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Has the Dominant Climatic Driver for the Carbon Budget of Alpine Grassland Shifted from Temperature to Precipitation on the Qinghai–Tibet Plateau?

Niu

Tang

et al. 2023

Remote Sensing

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The alpine grassland on the Qinghai–Tibet Plateau (AGQTP) has undergone severe climate change. Although the carbon budget of AGQTP proved to have altered significantly, the spatiotemporal dynamics and the driving mechanism of the changes remain debated. This study estimated the gross primary productivity (GPP), ecosystem respiration (ER), and net ecosystem productivity (NEP) of the AGQTP, based on remote sensing models, and analyzed their spatiotemporal dynamics and their climatic driving mechanism. Our results showed that the GPP, ER, and NEP increased at rates of 0.002 Pg C yr−2, 0.013 Pg C yr−2, and 0.0007 Pg C yr−2, respectively, during 2000–2020, with substantial spatiotemporal variability. The changes in GPP were influenced by both temperature and precipitation, while NEP and ER were primarily affected by precipitation and temperature, respectively. However, the primary climatic driver of the carbon budget may have shifted from temperature to precipitation around 2010, and the impact of temperature on carbon sink was limited by local water conditions. Furthermore, we found that climate change, particularly precipitation variation, had notable legacy effects on the carbon budget of the AGQTP. Our findings highlight that the climatic impact on the carbon budget is dynamic and long-lasting, rather than static and short-lived, which should be considered in ecosystem carbon budget simulations and other related studies.

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Section: Climate-driven Mechanisms Of the Carbon Budgetmentioning

confidence: 99%