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Results 2826 to 2850 of 8726
Super Dual Auroral Radar Network (SuperDARN) HF backscatter radaras scan 16 beam directions over a field of view of ~52°. In the common mode of operation, data is collected using 45-km range gates and 7-s integrations on each beam.
ABSTRACT. The Committee for Environmental Protection (CEP) was established under the Protocol on … Environmental Protection to the Antarctic Treaty to advise the Antarctic Treaty Consultative Meeting (ATCM) on … matters relating to protection of the Antarctic environment.
The 2002 revision of the UV index (UVI) issued by the World … Health Organisation (WHO), the World Meteorological Office … (WMO), the United Nations Environment Programme … (UNEP) and the International Commission on Non-Ionizing … Radiation Protection (ICNIRP) (World Health Organization … [2002]…
1] This study examines the accuracy of the model 501A UV biometer in taking … measurements relative to a predetermined background condition. The UVSPEC model … with the discrete ordinates radiative transfer (DISORT)…
On the cool, moist, extremely windy … subantarctic islands, vegetation is treeless and megaherbs, tussock grasses, and cushion plants are the … dominant plant growth forms. In world terms the … subantarctic environment is an unusual one…
Macquarie Island is an oceanic island located 1000k m south-east of Tasmania.The island, which lies close … to but north of the Antarctic Convergence is the southern most island in the world with a fairly complete cover of … vegetation. However…
Fan-Beam and Pencil-Beam Radar Scaterrometers on many satellites in polar orbits, e.g. ERS-1/2, ADEOS-1/2 and QuikSCAT, have been designed primarily for estimation of vector winds over the … global oceans. However, these scatterometers…
Antarctic coastal polynyas are important areas of high sea ice production and dense water … formation, and thus their detection including an estimate of thin ice thickness is essential.
The weekly National Ice Center (NIC) ice chart dataset is compared with in situ sea-ice … thickness observations from the AsPeCT program during five cruises for 1995 to 2000 … time period in the Ross Sea to discern their quality for use in monitoring sea ice thickness … and mass balance changes.
The IceCam is an automated sea ice observing and environmental da~ logging system … developedjo intly by the ScottishA ssociationf or Marine Science( SAMS) and the … Norwegian Polar Institute (NPI).
This paper introduces the recent activities of sea ice thickness observation around Syowa … station (400E), East Antarctica, conducted by the Japanese Antarctic Research Expedition … (JARE). Ship-borne video observations were conducted on 12 voyages from December … 1987.
Sea ice observations are difficult to obtain in sufficient temporal and spatial resolution. Several observational techniques have been used to build a sea ice record of ice … concentration, ice extent, and ice thickness among other things. Satellite measurements are … varied in their capabilities…
In autumn 2005, the GCOS Working Group on SST and Sea Ice (GCOS SST&SI WG) was redefined. The working group had been in existence, but inactive, for some 5 years, however it was concluded that there is a need for its activities. In short…
The Cryosphere and Climate Project (CliC) c~-ordinates climate activities related to all … parts of the earth's cryosphere. This includes sea ice, snow, ice shelves, ice bergs, lake ice, and permafrost. This talk will give a brief overview of the CliC project…
A study of the variation in snow cover and depth over the Antarctic sea ice zone was … performed using AMSR-E/Aqua snow depth and sea ice temperature products of … approximate 5-day intervals from June 2002 through December 2005. Time series statistic … analyses of mean and maximum snow depth…
Snow depth on sea ice plays a critical role in the heat exchange between ocean and … atmosphere because of its thermal insulation, which is almost an order of magnitude … greater than the thermal insulation of sea ice. Furthermore…
Long-range forecasts of Antarctic sea ice are tery much in demand, not only because of … the potential importance of sea ice in global climate, but also for the practical purpose of … exploring the Antarctic continent. Unfortunately…
I will review current efforts to model the Antarctic ice pack. Sea ice models in GCMs have … become more sophisticated in recent years; state-of-the-art models now include viscousplastic … dynamics, second-order-accurate advection, multilayer thermodynamics…
Microwave remote sensing has been a useful tool to monitor the conditions of sea ice and … ice extent in the polar regions.
I discuss 300-400 MHz ground-penetrating radar (GPR) profiles of sea ice in McMurdo … Sound, Antarctica. I recorded them in mid October, 2005 when ice temperature could have … eliminated most brine in the ice and allowed the bottom to be profiled.