HR: 1340h
AN: GC23A-0977    [Abstracts]
TI: Land Surface Water and Energy Budgets Assessment Across NEESPI
AU: Troy, T J
EM: tjtroy@princeton.edu
AF: Princeton University, Dept. of Civil & Environmental Engineering Princeton University, Princeton, NJ 08540, United States
AU: * Rennermalm, A K
EM: arennerm@princeton.edu
AF: Princeton University, Dept. of Civil & Environmental Engineering Princeton University, Princeton, NJ 08540, United States
AU: Wood, E F
EM: efwood@princeton.edu
AF: Princeton University, Dept. of Civil & Environmental Engineering Princeton University, Princeton, NJ 08540, United States
AB: Northern Eurasia represents a large region of the Earth's land surface, and observational evidence has shown a stronger climate change signal there than other regions of the globe. Despite its importance and climate sensitivity, the land surface's water and energy budgets in this region are poorly known. While land surface states are poorly described by observations due to the sparse monitoring network, the understanding of Northern Eurasia's land surface climate can be enhanced by offline land surface modeling. We use a retrospective, meteorological forcing dataset that extends back to 1930 to drive the Variable Infiltration Capacity (VIC) model, a macro-scale hydrologic model that has been shown to perform well in northern regions. Model validation with in situ observations provides an understanding of the mean and variability of hydrologic states across the NEESPI region. Given the length of the dataset, we examine the model's ability to capture the long-term discharge trends reported in the literature and examine if trends are also present in other hydrologic states. The combined study of trends in discharge and hydrological states may then further our understanding of what is causing the observed discharge trends in the large Arctic basins.
DE: 1833 Hydroclimatology
DE: 1836 Hydrological cycles and budgets (1218, 1655)
DE: 1847 Modeling
SC: Global Environmental Change [GC]
MN: 2007 Fall Meeting