Title Aerosols in polar regions; a historical overview based on optical depth and in situ observations
Author Tomasi, C.; Vitale, V.; Lupi, A.; Di Carmine, C.; Campanelli, M.; Herber, A.; Treffeisen, R.; Stone, R.S.; Andrews, E.; Sharma, S.; Radionov, V.; von Hoyningen- Huene, W.; Stebel, K.; Hansen, G.H.; Myhre, C.L.; Wehrli, C.; Aaltonen, V.; Lihavainen, H.; Virkkula, A.; Hillamo, R.; Strom, J.; Toledano, C.; Cachorro, V.E.; Oritz, P.; de Frutos, A.M.; Blindheim, S.; Frioud, M.; Gausa, M.; Zielinski, T.; Petelski, T.; Yamanouchi, T.
Author Affil Tomasi, C., CNR, Institute of Atmospheric Science and Climate, Bologna, Italy. Other: Alfred Wegener Institute of Polar Marine Research, Federal Republic of Germany; NOAA, Global Monitoring Division; Environment Canada, Canada; Arctic and Antarctic Research Institute, Russian Federation; University of Bremen, Federal Republic of Germany; Norwegian Institute for Air Research, Norway; World Radiation Centre, Switzerland; Finnish Meteorological Institute, Finland; Stockholm University, Sweden; Universidad de Valladolid, Spain; Andoya Rocket Range, Norway; Polish Academy of Sciences, Poland; National Institute of Polar Research, Japan
Source Journal of Geophysical Research, 112( D16), D16205. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0148-0227
Publication Date Aug. 27, 2007
Notes In English. 123 refs. Ant. Acc. No: 83532. CRREL Acc. No: 62002796
Index Terms aerosols; albedo; dust; fires; optical properties; polar regions; polar atmospheres; sediments; solar radiation; statistical analysis; Antarctica; Arctic Ocean; Arctic region; polar regions; Southern Ocean; annual variations; atmosphere; boreal environment; circulation; clastic sediments; forests; in situ; International Polar Year 2007-08; IPY 2007-08 Research Publications; monthly variations; seasonal variations; terrestrial environment; time series analysis; volcanism; wind transport
Abstract Large sets of filtered actinometer, filtered pyrheliometer and Sun photometer measurements have been carried out over the past 30 years by various groups at different Arctic and Antarctic sites and for different time periods. They were examined to estimate ensemble average, long-term trends of the summer background aerosol optical depth AOD(500 nm) in the polar regions (omitting the data influenced by Arctic haze and volcanic eruptions). The trend for the Arctic was estimated to be between -1.6% and -2.0% per year over 30 years, depending on location. No significant trend was observed for Antarctica. The time patterns of AOD(500 nm) and Angstrom's parameters alpha and beta measured with Sun photometers during the last 20 years at various Arctic and Antarctic sites are also presented. They give a measure of the large variations of these parameters due to El Chichon, Pinatubo, and Cerro Hudson volcanic particles, Arctic haze episodes most frequent in winter and spring, and the transport of Asian dust and boreal smokes to the Arctic region. Evidence is also shown of marked differences between the aerosol optical parameters measured at coastal and high-altitude sites in Antarctica. (mod. journ. abst.)
URL http://hdl.handle.net/10.1029/2007JD008432
Publication Type journal article
Record ID 282431