Jia HU | The University of Sheffield (original) (raw)

Jia HU

Address: Barnsley, Barnsley, United Kingdom

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Papers by Jia HU

Research paper thumbnail of Climatic influences on net ecosystem CO 2 exchange during the transition from wintertime carbon source to springtime carbon sink in a high-elevation, subalpine forest

Oecologia, 2005

The transition between wintertime net carbon loss and springtime net carbon assimilation has an i... more The transition between wintertime net carbon loss and springtime net carbon assimilation has an important role in controlling the annual rate of carbon uptake in coniferous forest ecosystems. We studied the contributions of springtime carbon assimilation to the total annual rate of carbon uptake and the processes involved in the winter-to-spring transition across a range of scales from ecosystem CO 2 fluxes to chloroplast photochemistry in a coniferous, subalpine forest. We observed numerous initiations and reversals in the recovery of photosynthetic CO 2 uptake during the initial phase of springtime recovery in response to the passage of alternating warm-and cold-weather systems. Full recovery of ecosystem carbon uptake, whereby the 24-h cumulative sum of NEE (NEE daily ) was consistently negative, did not occur until 3-4 weeks after the first signs of photosynthetic recovery. A key event that preceded full recovery Communicated by

Research paper thumbnail of Literature Review of Public Space and Local Environments for the Cross Cutting Review

Research paper thumbnail of Climatic influences on net ecosystem CO 2 exchange during the transition from wintertime carbon source to springtime carbon sink in a high-elevation, subalpine forest

Oecologia, 2005

The transition between wintertime net carbon loss and springtime net carbon assimilation has an i... more The transition between wintertime net carbon loss and springtime net carbon assimilation has an important role in controlling the annual rate of carbon uptake in coniferous forest ecosystems. We studied the contributions of springtime carbon assimilation to the total annual rate of carbon uptake and the processes involved in the winter-to-spring transition across a range of scales from ecosystem CO 2 fluxes to chloroplast photochemistry in a coniferous, subalpine forest. We observed numerous initiations and reversals in the recovery of photosynthetic CO 2 uptake during the initial phase of springtime recovery in response to the passage of alternating warm-and cold-weather systems. Full recovery of ecosystem carbon uptake, whereby the 24-h cumulative sum of NEE (NEE daily ) was consistently negative, did not occur until 3-4 weeks after the first signs of photosynthetic recovery. A key event that preceded full recovery Communicated by

Research paper thumbnail of Literature Review of Public Space and Local Environments for the Cross Cutting Review

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