Antecedent water condition determines carbon exchange response to extreme precipitation events across global drylands
نویسندگان
چکیده
The global hydrological cycle is predicted to be intensified under the warming climate, with more extreme precipitation events and longer dry spell in between. Here, we evaluated how (EPEs) antecedent (dry-EPEs) wet (wet-EPEs) water conditions influence carbon exchange along gradient of arid, semi-arid, sub-humid ecosystems based on eddy covariance datasets. After EPEs, ecosystem respiration gross primary productivity (GPP) were stimulated by pulses soil moisture arid semi-arid regions, but suppressed decreased temperature region. Antecedent condition determined asynchronous response GPP therefore fluctuations net balance. Net uptake capacity was enhanced immediately following wet-EPEs because rapid greater than respiration. However, after dry-EPEs, increased thereafter dry-EPEs lagged behind More further accumulative uptake. In general, accumulated within 3 weeks two times seven that region, respectively. acted as a sink wet-EPEs, source dry-EPEs. We conclude local climate regimes need considered when interpreting EPEs dryland ecosystems.
منابع مشابه
Climate Change Impact on Precipitation Extreme Events in Uncertainty Situation; Passing from Global Scale to Regional Scale
Global warming and then climate change are important topics studied by researchers throughout the world in the recent decades. In these studies, climatic parameters changes are investigated. Considering large-scaled output of AOGCMs and low precision in computational cells, uncertainty analysis is one of the principles in doing hydrological studies. For this reason, it is tried that investigati...
متن کاملEstimating the Response of Extreme Precipitation over Midlatitude Mountains to Global Warming
Global warming–induced changes in extreme orographic precipitation are investigated using a hierarchy of models: a global climate model, a limited-area weather forecast model, and a linear mountain wave model. The authors consider precipitation changes over an idealized north–southmidlatitudemountain barrier at the western margin of an otherwise flat continent. The intensities of the extreme ev...
متن کاملDecoupling of microbial carbon, nitrogen, and phosphorus cycling in response to extreme temperature events
Predicted changes in the intensity and frequency of climate extremes urge a better mechanistic understanding of the stress response of microbially mediated carbon (C) and nutrient cycling processes. We analyzed the resistance and resilience of microbial C, nitrogen (N), and phosphorus (P) cycling processes and microbial community composition in decomposing plant litter to transient, but severe,...
متن کاملFine-scale processes regulate the response of extreme events to global climate change.
We find that extreme temperature and precipitation events are likely to respond substantially to anthropogenically enhanced greenhouse forcing and that fine-scale climate system modifiers are likely to play a critical role in the net response. At present, such events impact a wide variety of natural and human systems, and future changes in their frequency and/or magnitude could have dramatic ec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Theoretical and Applied Climatology
سال: 2022
ISSN: ['1434-4483', '0177-798X']
DOI: https://doi.org/10.1007/s00704-022-04134-0