Engineering topics

Drinkwater, M.

Publications and source records attributed to Drinkwater, M..

At least 19 records

NASA NTRS2000

Azimuth variation in microwave scatterometer and radiometer data over Antarctica

In this paper, we explore the use of NASA scatterometer (NSCAT) data, European remote sensing (ERS) advanced microwave instrument (AMI) scatterometer mode data, and special sensor microwave/imager (SSM/I) data to study surface roughness effects in Antarctica. All three sensors provide strong evidence of azimuth modulation, which is correlated with the surface slope environment and results in a katabatic wind flow regime.

azimuthal↗

NASA NTRS2000

Recent changes in the microwave scattering properties of the Antarctic ice sheet

Time series, satellite microwave data are used to monitor and quantify changes in the scattering properties of the Antarctic ice sheet. Daily ERS scatterometer (EScat) and Special Sensor Microwave/Imager (SSM/I) image data, acquired since 1992, are analyzed to understand the seasonal and interannual changes over the ice sheet.

Remote↗

NASA NTRS2000

Combined Satellite - and ULS-Derived Sea-Ice Flux in the Weddell Sea

Several years of daily microwave satellite ice-drift are combined with moored Upward Looking Sonar (ULS) ice-drafts into an ice volume flux record at points along a flux gate across the Weddell Sea, Antarctica.

microwave satellite ice-drift ice volume flux↗

NASA NTRS1999

Quantifying Surface Fluxes in the Ice-Covered Polar Oceans Using Microwave Satellite Data

Explore the source record for details and available documents.

Polar ice sea ice remote sensing satellite sea sur↗

NASA NTRS1999

Satellite-Derived Dynamics of Southern Ocean Sea Ice

UNKNOWN

sea↗

NASA NTRS1999

Active and Passive Microwave Determination of the Circulation and Characteristics of Weddell and Ross Sea Ice

A combination of satellite microwave data sets are used in conjuction with ECMWF and NCEP meterological analysis fields to investigate seasonal variability in the circulation and sea-ice dynamics of the Weddell and Ross Seas.

sea↗

NASA NTRS1999

Seasonal to Interannual Variability in Antarctic Sea-Ice Surface Melt

Satellite remote sensing time series images are used to illustrate the spatial and temporal variability in Antarctic-wide ice-surface melting during the austral summer.

sea↗

NASA NTRS1999

Austral Summer Sea Ice Melt Revealed in Antarctic ERS-1/2 and NSCAT Scatterometer Data

The first in-situ field observations of Antarcic austral summer sea-ice melt were made in the Bellingshausen Sea by Arctowski (1908) on Belgica in 1899, and later by Wordie (1921) during the ill-fated drift of Endurance in the Weddell Sea from 1914-1916.

Sea-Ice summar melt radar↗

NASA NTRS1998

Seasat, ERS-1/2 and NSCAT Scatterometer Observed Changes on the Large Ice Sheets

Satellite-borne wind scatterometers are effective tools for monitoring ice sheets and microwave imaging techniques enable comparison of historic and contemporary scatterometer data in climate change studies.

scatterometers↗

NASA NTRS1998

Interannual Variability in Weddell Sea Ice from ERS Wind Scatterometer

ERS-1/2 SAR and Wind Scatterometer data are analyzed together with SSM/I radiometer data to investigate interannual variability in Weddell Sea ice and summer melt signatures during the period 1992-1997.

ERS-1/2↗

NASA NTRS1997

Interannual Variability in Weddell Sea Ice Formation and Bottom Water Outflow in Response to the Antarctic Circumpolar Wave

The seasonal sea-ice cover surrounding the continent of Antarctica, together with the circumpolar current belt, form a contiguous pathway for propagation and transfer of climatological anomalies around the Sourthern hemisphere.

sea-ice Antarctic Circumpolar Wave Weddell Sea↗

NASA NTRS1997

ERS Satellite Microwave Radar Observations of Antarctic Sea-Ice Dynamics

UNKNOWN

Antarctic↗

NASA NTRS1997

ERS Satellite Microwave Radar Observations of Antarctic Sea-Ice Dynamics

ERS-1 and ERS-2 scatterometer and SAR data are used to monitor and track large and small-scale sea-ice dynamics in the Southern Ocean, and in particular in the Weddell Sea, Antarctica. Sea-ice formation in the Weddell Sea regulates vertical and horizontal thermohaline circulation and influences bottom water production rates.

Antarctic↗

NASA NTRS1994

ERS-1 Investigations of Southern Ocean Sea Ice Geophysics Using Combined Scatterometer and SAR Images

Coregistered ERS-1 SAR and Scatterometer data are presented for the Weddell Sea, Antarctica. Calibrated image backscatter statistics are extracted from data acquired in regions where surface measurements were made during two extensive international Weddell Sea experiments in 1992. Changes in summer ice-surface conditions, due to temperature and wind, are shown to have a large impact on observed microwave backscatter values. Winter calibrated backscatter distributions are also investigated as a way of describing ice thickness conditions in different location during winter. Coregistered SAR and EScat data over a manned drifting ice station are used to illustrate the seasonal signature changes occurring during the fall freeze-up transition.

sea-ice Weddell Sea ice formation↗

NASA NTRS1994

Satellite Microwave Radar- and Buoy-tracked Ice Motion in the Weddell Sea during WWGS '92

The first results of ERS-1 SAR sea-ice drift tracking are presented for Antarctica. Summer and winter examples illustrate temporal variations in ice drift in the Western and Eastern Weddell Sea during two field experiments. Time-series of mean drift velocity, divergence and rotation are compared with meteorological data from an ice camp and by instrumented buoys. Results indicate that SAR successfully characterizes the.

sea-ice ice formation Weddell Sea↗

NASA NTRS1994

Airborne and Satellite SAR Investigations of Sea-Ice Surface Characteristics

The logistical difficulty of making measurements in polar oceans during winter makes remote-sensing techniques attractive.

microwave signatures↗

NASA NTRS1994

Enhanced Resolution ERS-1 Scatterometer Imaging of Southern Ocean Sea Ice

A new method of image reconstruction is described which allows enhanced resolution images to be produced from gridded C-band ERS-1 AMI scatterometer data.

enhanced↗

NASA NTRS1993

Winter Sea Ice Mapping From Multi-Parameter Synthetic Aperture Radar Data

This paper presents examples of quantitative improvements in classification accuracy of six winter ice conditions using SAR data resulting from the combination of multiple polarizations and frequencies.

winter sea ice synthetic aperture radar (SAR)↗