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Global maps of soil temperatureNARA Subscribed
Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1‐km 2 r...
The CONterminous United States (CONUS) presents a large range of climate conditions and biomes where terrestrial primary productivity and its inter‐annual variability are controlled regionally by rainfall and/or temperature. Here, the response of ecosystem productivity to those climate variables was investigated across different biomes from 2010 to 2018 using three climate datasets of precipitation, air temperature or drought...
Rising atmospheric [CO 2 ], c a , is expected to affect stomatal regulation of leaf gas‐exchange of woody plants, thus influencing energy fluxes as well as carbon (C), water, and nutrient cycling of forests. Researchers have proposed various strategies for stomatal regulation of leaf gas‐exchange that include maintaining a constant leaf internal [CO 2 ], c i , a constant drawdown in CO 2 ( c a − c i ), and a constant c i / c a...
Carbon isotope evidence for recent climate‐related enhancement of CO 2 assimilation and peat accumulation rates in AntarcticaNARA Subscribed
Signy Island, maritime Antarctic, lies within the region of the Southern Hemisphere that is currently experiencing the most rapid rates of environmental change. In this study, peat cores up to 2 m in depth from four moss banks on Signy Island were used to reconstruct changes in moss growth and climatic characteristics over the late Holocene. Measurements included radiocarbon dating (to determine peat accumulation rates) and st...
Strong seasonal disequilibrium measured between the oxygen isotope signals of leaf and soil CO 2 exchangeNARA Subscribed
The oxygen isotope composition ( δ 18 O) of atmospheric CO 2 is among a very limited number of tools available to constrain estimates of the biospheric gross CO 2 fluxes, photosynthesis and respiration at large scales. However, the accuracy of the partitioning strongly depends on the extent of isotopic disequilibrium between the signals carried by these two gross fluxes. Chamber‐based field measurements of total CO 2 and CO 18...
Evaporation and carbonic anhydrase activity recorded in oxygen isotope signatures of net CO 2 fluxes from a Mediterranean soilNARA Subscribed
The oxygen stable isotope composition ( δ 18 O) of CO 2 is a valuable tool for studying the gas exchange between terrestrial ecosystems and the atmosphere. In the soil, it records the isotopic signal of water pools subjected to precipitation and evaporation events. The δ 18 O of the surface soil net CO 2 flux is dominated by the physical processes of diffusion of CO 2 into and out of the soil and the chemical reactions during...
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