Climate forcing by the volcanic eruption of Mount Pinatubo
نویسندگان
چکیده
[1] We determine the volcano climate sensitivity l and response time t for the Mount Pinatubo eruption, using observational measurements of the temperature anomalies of the lower troposphere, measurements of the long wave outgoing radiation, and the aerosol optical density. Using standard linear response theory we find l = 0.15 ± 0.06 K/(W/m), which implies a negative feedback of 1.4 (+0.7, 1.6). The intrinsic response time is t = 6.8 ± 1.5 months. Both results are contrary to a paradigm that involves long response times and positive feedback. Citation: Douglass, D. H., and R. S. Knox (2005), Climate forcing by the volcanic eruption of Mount Pinatubo, Geophys. Res. Lett., 32, L05710, doi:10.1029/2004GL022119.
منابع مشابه
Effects of Mount Pinatubo volcanic eruption on the hydrological cycle as an analog of geoengineering
[1] The problem of global warming arises from the buildup of greenhouse gases such as carbon dioxide from burning of fossil fuels and other human activities that change the composition of the atmosphere and alter outgoing longwave radiation (OLR). One geoengineering solution being proposed is to reduce the incoming sunshine by emulating a volcanic eruption. In between the incoming solar radiati...
متن کاملDid the Toba volcanic eruption of 74 ka B.P. produce widespread glaciation?
[1] It has been suggested that the Toba volcanic eruption, approximately 74 ka B.P., was responsible for the extended cooling period and ice sheet advance immediately following it, but previous climate model simulations, using 100 times the amount of aerosols produced by the 1991 Mount Pinatubo eruption, have been unable to produce such a prolonged climate response. Here we conduct six addition...
متن کاملGlobal cooling after the eruption of Mount Pinatubo: a test of climate feedback by water vapor.
The sensitivity of Earth's climate to an external radiative forcing depends critically on the response of water vapor. We use the global cooling and drying of the atmosphere that was observed after the eruption of Mount Pinatubo to test model predictions of the climate feedback from water vapor. Here, we first highlight the success of the model in reproducing the observed drying after the volca...
متن کاملMagmatic vapor source for sulfur dioxide released during volcanic eruptions: evidence from mount pinatubo.
Sulfur dioxide (SO(2)) released by the explosive eruption of Mount Pinatubo on 15 June 1991 had an impact on climate and stratospheric ozone. The total mass of SO(2) released was much greater than the amount dissolved in the magma before the eruption, and thus an additional source for the excess SO(2) is required. Infrared spectroscopic analyses of dissolved water and carbon dioxide in glass in...
متن کاملClimate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere-ocean general circulation model
[1] Two versions of a coupled atmosphere-ocean general circulation model (GCM) with different climate sensitivities are tested on global cooling following the Pinatubo volcanic eruption to investigate the validity of high climate sensitivities. The higher-sensitivity version, with climate sensitivity of 6.3 K for doubled CO2 forcing, overestimates cooling due to the volcanic eruption, whereas t...
متن کامل