Impacts of tropical cyclones on hydrochemistry of a subtropical forest

C. T. Chang, S. P. Hamburg, J. L. Hwong, N. H. Lin, M. L. Hsueh, M. C. Chen, T. C. Lin

研究成果: 雜誌貢獻文章

13 引文 斯高帕斯(Scopus)

摘要

Tropical cyclones (typhoons/hurricanes) have major impacts on the biogeochemistry of forest ecosystems, but the stochastic nature and the long intervals between storms means that there are limited data on their effects. We characterised the impacts of 14 typhoons over six years on hydrochemistry of a subtropical forest plantation in Taiwan, a region experiencing frequent typhoons. Typhoons contributed 1/3 of the annual rainfall on average, but ranged from 4 to 55%. The stochastic nature of annual typhoon related precipitation poses a challenge with respect to managing the impacts of these extreme events. This challenge is exacerbated by the fact that typhoon-related rainfall is not significantly correlated with wind velocity, the current focus of weather forecasts. Thus, little advance warning is provided for the hydrological impacts of these storms.

The typhoons we studied contributed approximately one third of the annual input and output of most nutrients (except nitrogen) during an average 9.5 day yr-1 period, resulting in nutrient input/output rates an order of magnitude greater than during non-typhoon months. Nitrate output balanced input during the non-typhoon period, but during the typhoon period an average of 10 kg ha-1 yr-1 nitrate was lost. Streamwater chemistry exhibited similarly high variability during typhoon and non-typhoon periods and returned to pre-typhoon levels one to three weeks following each typhoon. The streamwater chemistry appears to be very resilient in response to typhoons, resulting in minimal loss of nutrients.

原文英語
頁(從 - 到)3815-3826
頁數12
期刊Hydrology and Earth System Sciences
17
發行號10
DOIs
出版狀態已發佈 - 2013 十月 21

    指紋

ASJC Scopus subject areas

  • Water Science and Technology
  • Earth and Planetary Sciences (miscellaneous)

引用此

Chang, C. T., Hamburg, S. P., Hwong, J. L., Lin, N. H., Hsueh, M. L., Chen, M. C., & Lin, T. C. (2013). Impacts of tropical cyclones on hydrochemistry of a subtropical forest. Hydrology and Earth System Sciences, 17(10), 3815-3826. https://doi.org/10.5194/hess-17-3815-2013