Monitoring Global Energy Flow to Primary Production 

作成者 Dye, Dennis G.
日本十進分類法 (NDC) 450
内容 研究概要:Global satellite estimates of annual incident and terrestrial vegetation-absorbed photosynthetically active radiation (PAR, 400-700 nm) are evaluated for the 11 years from 1979 to 1989. The data sets were derived from Nimbus-7 Total Ozone Mapping Spectrometer (TOMS) and NOAA Advanced Very High Resolution Radiometer (AVHRR) observations. The mean annual total PAR incident at the Earth's surface between 60°N and 60°S latitudes is estimated to be 1.26×10^6 EJ, of which 9.17×10^5 EJ (73%) is incident on ocean surfaces and 3.42×10^5 EJ (27%) is incident on terrestrial surfaces. A 1.7% reduction in northern hemisphere (60°N-0°) incident PAR in 1982 is attributed to changes in cloud amount and distribution associated with El Nino-Southern Oscillation conditions and possibly aerosols from the 1982 El Chichon volcanic eruption. The estimated annual total PAR absorbed by terrestrial vegetation (APAR) between 60°N and 60°S is 1.10×10^5 EJ, or 8.8% of total incident PAR (11-year means). The observed patterns of distribution and variability account for the primary flow of energy to global primary production.
コンテンツの種類 研究報告書 Research Paper
DCMI資源タイプ text
掲載誌情報 Proceedings of the international symposium on Vegetation Monitoring page.79-86 (1995)
言語 英語

Total Access Count:

406 times.

Related Materials in