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Global tropical cyclone (TC) activity is simulated by the Geophysical Fluid Dynamics Laboratory (GFDL) CM2.5 model, which is a fully coupled global climate model with horizontal resolution of about 50km for atmosphere and 25 km for ocean. The present-day climate simulation shows fairly realistic glo...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.363.9159 http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/gav/publications/kvkadrzz_13_cm25_tcs.pdf |
| Summary: | Global tropical cyclone (TC) activity is simulated by the Geophysical Fluid Dynamics Laboratory (GFDL) CM2.5 model, which is a fully coupled global climate model with horizontal resolution of about 50km for atmosphere and 25 km for ocean. The present-day climate simulation shows fairly realistic global TC frequency, TC seasonal cycle, and geographical distribution in the various basins. The model has some notable biases in regional TC activity, including simulating too few TCs in the North Atlantic basin. The regional biases in TC activity are associated with simulation biases in the large-scale environment such as sea surface temperature, vertical wind shear, and 500 hPa vertical velocity. Despite these biases, the model simulates the large-scale variations of TC activity induced by El Nino/Southern Oscillation fairly realistically. The response of TC activity in the model to global warming is investigated by comparing the present climate with a CO2 doubling experiment. Globally, TC frequency decreases (-19%) while TC lifetime-maximum intensity increases (+2.7%) in response to the CO2 doubling, consistent with previous studies. The average TC lifetime decreases by-4.6%, while the TC size and TCinduced |
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