Surface wind speed retrieval using passive microwave polarimetry: the dependence on atmospheric stability

Pospelov, M.N.

doi:10.1109/igarss.1995.524022

Cited by 9 publications

(6 citation statements)

References 6 publications

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“…Several authors have reported on the importance of stability in determining the signatures of signals either scattered or emitted from the ocean surface. For example, stability has shown to be important for radar backscatter [Keller et al, 1985;Smirnov, 1995] and for remote sensing of near-ocean surface wind speed by passive microwave polarimetry [Pospelov, 1996]. Finally, sea-air temperature difference has been shown to play a role in determining the statistics of sea surface mean-square slope, as measured by a scanning laser glint technique [Shaw and Chumside, 1997].…”

Section: Introductionmentioning

confidence: 92%

Sea‐air and boundary layer temperatures measured by a scanning 5‐mm‐wavelength radiometer: Recent results

Westwater¹,

Han²,

Irisov³

et al. 1998

Radio Science

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Section: Introductionmentioning

confidence: 92%

Sea‐air and boundary layer temperatures measured by a scanning 5‐mm‐wavelength radiometer: Recent results

Westwater¹,

Han²,

Irisov³

et al. 1998

Radio Science

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“…Both T s and (T b ) play pivotal roles in the model but we find that systematic explained variance attributed to these terms never exceeds 20% and is usually much lower. Aside from the expected satellite crossover intercomparison and sensor estimate noise, as well as errors introduced via use of monthly Ts, there is also the possibility of systematic dependence on geophysical factors (e.g., sea state, atmospheric stability [14], [32], and wind direction) other than the wind speed itself. The averaged data represent a composite of various wind directions with respect to the observing coordinate system.…”

Section: Dependence Of Emissivity On Wind Speedmentioning

confidence: 99%

The dependence of nadir ocean surface emissivity on wind vector as measured with microwave radiometer

Tran

Vandemark

Ruf

et al. 2002

IEEE Trans. Geosci. Remote Sensing

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Global brightness temperature observations of TOPEX/Poseidon microwave radiometer (TMR) at 18, 21, and 37 GHz have been collocated with near-simultaneous SeaWinds wind vector data as well as with monthly sea surface temperature and salinity products. The combined data allow us to study the dependence of zenith-directed ocean surface emissivity, at each frequency, upon both wind speed and direction. Results show a clear two-branch wind speed dependence; weak and linear below 7 m s with an increase in sensitivity above that point. The observed emissivity also depends on the angle between the wind direction and TMR's antenna polarization orientation, providing satellite confirmation of aircraft-derived results. There is little change in these wind vector dependencies with frequency.

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“…Therefore, the measurement of the air-sea interface stability is becoming an important part of retrieving near-surface wind vectors from microwave radiometer and radar data. 4,5 Measurement of the air-sea temperature difference with in situ sensors is difficult because submerged temperature sensors measure the bulk water temperature, which can be quite different from the skin temperature. 6 -8 The water skin temperature is most readily measured with a radiometer, but in situ sensors are also used.…”

Section: Introductionmentioning

confidence: 99%

Scanning infrared radiometer for measuring the air–sea temperature difference

Shaw¹,

Cimini²,

Westwater³

et al. 2001

Appl. Opt.

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We describe a vertically scanning infrared radiometer for measuring the air-sea temperature difference without disturbing the water skin layer. The radiometer operates with a single wavelength channel that is 1.1 mum wide, centered on 14.2 mum, on the short-wavelength edge of a CO(2) atmospheric absorption band. The resulting high atmospheric absorption enables calibration of the horizontal-viewing signal with an in situ air-temperature sensor. The signal at all other scan angles is measured relative to that at the horizontal, providing a differential air-sea temperature measurement that is nearly independent of calibration offsets that can be a problem with independent air- and water-temperature sensors. We show data measured on a ship in the Tropical Western Pacific Ocean during July 1999, which exhibit important discrepancies from in situ data using bulk air-and water-temperature sensors. These discrepancies illustrate important differences between bulk versus skin water temperature.

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Surface wind speed retrieval using passive microwave polarimetry: the dependence on atmospheric stability

Cited by 9 publications

References 6 publications

Sea‐air and boundary layer temperatures measured by a scanning 5‐mm‐wavelength radiometer: Recent results

Sea‐air and boundary layer temperatures measured by a scanning 5‐mm‐wavelength radiometer: Recent results

The dependence of nadir ocean surface emissivity on wind vector as measured with microwave radiometer

Scanning infrared radiometer for measuring the air–sea temperature difference

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