# Trophic Function in Estuaries - Response of Macrobenthos to Natural and Contaminant Gradients

作者:科技文献资料网 时间:2018-10-19 21:11:48 浏览:8512
来源:科技文献资料网

[唯一标识符]:CDSTIC.ISTP.1488645

[文献来源]:科学技术会议录索引(ISTP)

[文献类型]:科技会议

[标题]:Trophic Function in Estuaries - Response of Macrobenthos to Natural and Contaminant Gradients

[作者]:GR Gaston;CF Rakocinski;SS Brown;CM Cleveland

[出版单位]:C S I R O PublishingCollingwood

[ISSN_ISBN]:1323-1650

[会议名称]:International Conference on the Ecology of Estuaries and Soft-Sediment Habitats,Geelong, Australia,February 1997

[来源]:AUSTRALIAN JOURNAL OF ECOLOGY;MARINE AND FRESHWATER RESEARCH,pp 833-846

[主办单位]:Alcoa Australia;Deakin Univ;Ecol Soc Australia;Environm Protect Authority Victoria;Qantas;W Coast Railway

[地址]:GR Gaston,Univ_Mississippi, Dept Biol, University, MS 38677 USA

[专业领域]:Oceanography,Marine & Freshwater Biology,Limnology,Fisheries

[唯一标识符]:CDSITC.AEROSPACE.A04-11739

[文献来源]:美国航空航天数据库(aerospace)

[资源原始索取号]:A2004-11739

[标题]:Decay of satellite orbits using K-S elements in an oblate diurnally varying atmosphere with scale height dependent on altitude

[作者]:Nair L S; Sharma R K

[来源]:Advances-in-Space-Research. 2003 April; vol. 31, no. 8: 2011-2017 JN: Advances-in-Space-Research

[文摘]:A non-singular analytical theory for the motion of near-Earth satellite orbits with the air drag effect is developed in terms of the K-S elements utilizing an analytical, oblate diurnally varying atmospheric model with varying scale height, dependent on altitude. The series expansions include up to fourth- order terms in eccentricity (e) and c, a small parameter dependent on the flattening of the atmosphere. Only two of the nine equations are solved analytically to compute the state vector at the end of each revolution due to symmetry in the K-S element equations. Numerical studies are done over a wide range of orbital parameters. A numerical comparison with numerically integrated values of the change in the orbital parameters: semi-major axis and eccentricity is made with the extended theory up to fourth-order terms of Swinerd an

[关键词]:SATELLITE ORBITS; ORBIT DECAY; DIURNAL VARIATIONS; ORBITAL ELEMENTS; EARTH ORBITS; FLIGHT ALTITUDE; ATMOSPHERIC MODELS; ANALYTIC FUNCTIONS; STATE VECTORS

[出版年份]:2003

[专业领域]:13 Astrodynamics

[唯一标识符]:CDSITC.AEROSPACE.A03-40134

[文献来源]:美国航空航天数据库(aerospace)

[资源原始索取号]:A2003-40134

[标题]:Simulations of aerosol-cloud-dynamical feedbacks resulting from entrainment of aerosol into the marine boundary layer during the Atlantic Stratocumulus Transition Experiment

[作者]:Jiang H; Feingold G; Cotton W R

[来源]:Journal-of-Geophysical-Research. D. Atmospheres. 2002 December; vol. 107, no. D24:

[文摘]:Numerical simulations of a cloudy marine boundary layer (MBL) observed during the Atlantic Stratocumulus Transition Experiment were performed to study the influence of entrainment of free tropospheric cloud condensation nuclei (CCN) on cloud microphysics, dynamics, and radiative properties. The initial CCN concentration is 100/cu cm in one simulation, while in the second simulation it varies from 100/cu cm below the cloud top to a peak of 1200/cu cm at the inversion. In the clean case, cooling from evaporating drizzle destabilizes the layer just below cloud base (not the entire subcloud layer) with respect to the surface, and promotes stronger penetrating cumulus. In the case with the elevated pollution layer, reduced drizzle at the cloud base results in weaker penetrating cumulus and a less effective supply of surface moisture to the cloud. This results in a much lower liquid water path (LWP) relative to the clean case that offsets the cloud albedo enhancement due to higher drop concentrations. Thus, although entrained CCN enhance the droplet concentration, the net effect on the cloud albedo is small. Additional simulations were performed to study the sensitivity of the MBL to varying levels of largescale subsidence. The change in large-scale subsidence has a large effect on boundary layer dynamics, cloud microphysics, and the radiative budget. The simulations are used to separate the effects of enhanced albedo due to enhanced drop concentrations at constant LWP and those where LWP is modified due to dynamical feedbacks. For this case study, weaker subsidence results in a cloud with higher LWP and a cloud albedo that is enhanced over and above that due to enhanced droplet concentration. The simulations point to the complex dynamical-microphysical-radiative feedbacks in the MBL and how elevated polluted layers can change cloud r

[关键词]:MARINE ATMOSPHERE; CLOUD PHYSICS; MICROPHYSICS ; AEROSOLS ; ENTRAINMENT ; EARTH RADIATION BUDGET; ATMOSPHERIC BOUNDARY LAYER; DYNAMIC CHARACTERISTICS; STRATOCUMULUS CLOUDS; CONDENSATION NUCLEI; MARINE METEOROLOGY; POLLUTION TRANSPORT; RADIATIVE FORCING; E

[出版年份]:2002

[专业领域]:Geophysics