Improving satellite retrieved night-time infrared sea surface temperatures in aerosol contaminated regions

Bingkun Luo, Peter J. Minnett, Chelle Gentemann, Goshka Szczodrak

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Satellite retrievals of sea surface temperature (SST) have become necessary for many applications. Satellite infrared imaging radiometers passively measure the radiance emitted and reflected by the surface of the Earth and atmosphere. Tropospheric aerosols increase the signal attenuation at the satellite height, degrading the accuracy of SST retrievals. In this study to assess the infrared radiative effects of aerosols on satellite-derived skin SSTs (SSTskin), MODIS (MODerate-resolution Imaging Spectroradiometer) SSTskin retrievals are compared with quality-controlled, collocated SSTskin measurements from the Marine-Atmospheric Emitted Radiance Interferometer (M-AERI) deployed on research cruises during the Aerosols and Ocean Science Expeditions (AEROSE), and sub-surface temperatures measured by thermistors on drifting buoys. In this region, SSTskin retrievals from the MODIS on the Aqua satellite are generally much cooler than the in-situ measurements. In the Saharan outflow area between 90° W to 90° E and 20° S to 35° N where aerosol optical depths may be >0.5, satellite SSTskin are often >1 K cooler than the in situ data. The goal of this research is to determine the characteristics of aerosol effects on satellite retrieved infrared SST, and to derive formulae for improving accuracies of infrared-derived SSTs in aerosol-contaminated regions. A new method to derive a night-time Dust-induced SST Difference Index (DSDI) algorithm based on simulated brightness temperatures and Principal component (PC) analysis (PCA) at infrared wavelengths of 3.8, 8.9, 10.8 and 12.0 μm, was developed using radiative transfer simulations. The satellite SSTskin biases and standard deviations, derive by comparisons with coincident and collocated surface and in situ measurements, are reduced by 0.263 K and 0.166 K after the DSDI correction. This method can also improve the fraction of useful data available compared to the usual approach of discarding measurements identified as being contaminated by the effects of aerosols.

Original languageEnglish (US)
Pages (from-to)8-20
Number of pages13
JournalRemote Sensing of Environment
Volume223
DOIs
StatePublished - Mar 15 2019

Fingerprint

aerosols
Aerosols
surface temperature
sea surface temperature
Satellites
aerosol
Infrared radiation
Temperature
moderate resolution imaging spectroradiometer
radiance
in situ measurement
MODIS
coolers
dust
Dust
Aqua (satellite)
Imaging techniques
Buoys
Thermistors
radiometers

ASJC Scopus subject areas

  • Soil Science
  • Geology
  • Computers in Earth Sciences

Cite this

Improving satellite retrieved night-time infrared sea surface temperatures in aerosol contaminated regions. / Luo, Bingkun; Minnett, Peter J.; Gentemann, Chelle; Szczodrak, Goshka.

In: Remote Sensing of Environment, Vol. 223, 15.03.2019, p. 8-20.

Research output: Contribution to journalArticle

@article{61e156e56de24592a465b487baa96466,
title = "Improving satellite retrieved night-time infrared sea surface temperatures in aerosol contaminated regions",
abstract = "Satellite retrievals of sea surface temperature (SST) have become necessary for many applications. Satellite infrared imaging radiometers passively measure the radiance emitted and reflected by the surface of the Earth and atmosphere. Tropospheric aerosols increase the signal attenuation at the satellite height, degrading the accuracy of SST retrievals. In this study to assess the infrared radiative effects of aerosols on satellite-derived skin SSTs (SSTskin), MODIS (MODerate-resolution Imaging Spectroradiometer) SSTskin retrievals are compared with quality-controlled, collocated SSTskin measurements from the Marine-Atmospheric Emitted Radiance Interferometer (M-AERI) deployed on research cruises during the Aerosols and Ocean Science Expeditions (AEROSE), and sub-surface temperatures measured by thermistors on drifting buoys. In this region, SSTskin retrievals from the MODIS on the Aqua satellite are generally much cooler than the in-situ measurements. In the Saharan outflow area between 90° W to 90° E and 20° S to 35° N where aerosol optical depths may be >0.5, satellite SSTskin are often >1 K cooler than the in situ data. The goal of this research is to determine the characteristics of aerosol effects on satellite retrieved infrared SST, and to derive formulae for improving accuracies of infrared-derived SSTs in aerosol-contaminated regions. A new method to derive a night-time Dust-induced SST Difference Index (DSDI) algorithm based on simulated brightness temperatures and Principal component (PC) analysis (PCA) at infrared wavelengths of 3.8, 8.9, 10.8 and 12.0 μm, was developed using radiative transfer simulations. The satellite SSTskin biases and standard deviations, derive by comparisons with coincident and collocated surface and in situ measurements, are reduced by 0.263 K and 0.166 K after the DSDI correction. This method can also improve the fraction of useful data available compared to the usual approach of discarding measurements identified as being contaminated by the effects of aerosols.",
author = "Bingkun Luo and Minnett, {Peter J.} and Chelle Gentemann and Goshka Szczodrak",
year = "2019",
month = "3",
day = "15",
doi = "10.1016/j.rse.2019.01.009",
language = "English (US)",
volume = "223",
pages = "8--20",
journal = "Remote Sensing of Environment",
issn = "0034-4257",
publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Improving satellite retrieved night-time infrared sea surface temperatures in aerosol contaminated regions

AU - Luo, Bingkun

AU - Minnett, Peter J.

AU - Gentemann, Chelle

AU - Szczodrak, Goshka

PY - 2019/3/15

Y1 - 2019/3/15

N2 - Satellite retrievals of sea surface temperature (SST) have become necessary for many applications. Satellite infrared imaging radiometers passively measure the radiance emitted and reflected by the surface of the Earth and atmosphere. Tropospheric aerosols increase the signal attenuation at the satellite height, degrading the accuracy of SST retrievals. In this study to assess the infrared radiative effects of aerosols on satellite-derived skin SSTs (SSTskin), MODIS (MODerate-resolution Imaging Spectroradiometer) SSTskin retrievals are compared with quality-controlled, collocated SSTskin measurements from the Marine-Atmospheric Emitted Radiance Interferometer (M-AERI) deployed on research cruises during the Aerosols and Ocean Science Expeditions (AEROSE), and sub-surface temperatures measured by thermistors on drifting buoys. In this region, SSTskin retrievals from the MODIS on the Aqua satellite are generally much cooler than the in-situ measurements. In the Saharan outflow area between 90° W to 90° E and 20° S to 35° N where aerosol optical depths may be >0.5, satellite SSTskin are often >1 K cooler than the in situ data. The goal of this research is to determine the characteristics of aerosol effects on satellite retrieved infrared SST, and to derive formulae for improving accuracies of infrared-derived SSTs in aerosol-contaminated regions. A new method to derive a night-time Dust-induced SST Difference Index (DSDI) algorithm based on simulated brightness temperatures and Principal component (PC) analysis (PCA) at infrared wavelengths of 3.8, 8.9, 10.8 and 12.0 μm, was developed using radiative transfer simulations. The satellite SSTskin biases and standard deviations, derive by comparisons with coincident and collocated surface and in situ measurements, are reduced by 0.263 K and 0.166 K after the DSDI correction. This method can also improve the fraction of useful data available compared to the usual approach of discarding measurements identified as being contaminated by the effects of aerosols.

AB - Satellite retrievals of sea surface temperature (SST) have become necessary for many applications. Satellite infrared imaging radiometers passively measure the radiance emitted and reflected by the surface of the Earth and atmosphere. Tropospheric aerosols increase the signal attenuation at the satellite height, degrading the accuracy of SST retrievals. In this study to assess the infrared radiative effects of aerosols on satellite-derived skin SSTs (SSTskin), MODIS (MODerate-resolution Imaging Spectroradiometer) SSTskin retrievals are compared with quality-controlled, collocated SSTskin measurements from the Marine-Atmospheric Emitted Radiance Interferometer (M-AERI) deployed on research cruises during the Aerosols and Ocean Science Expeditions (AEROSE), and sub-surface temperatures measured by thermistors on drifting buoys. In this region, SSTskin retrievals from the MODIS on the Aqua satellite are generally much cooler than the in-situ measurements. In the Saharan outflow area between 90° W to 90° E and 20° S to 35° N where aerosol optical depths may be >0.5, satellite SSTskin are often >1 K cooler than the in situ data. The goal of this research is to determine the characteristics of aerosol effects on satellite retrieved infrared SST, and to derive formulae for improving accuracies of infrared-derived SSTs in aerosol-contaminated regions. A new method to derive a night-time Dust-induced SST Difference Index (DSDI) algorithm based on simulated brightness temperatures and Principal component (PC) analysis (PCA) at infrared wavelengths of 3.8, 8.9, 10.8 and 12.0 μm, was developed using radiative transfer simulations. The satellite SSTskin biases and standard deviations, derive by comparisons with coincident and collocated surface and in situ measurements, are reduced by 0.263 K and 0.166 K after the DSDI correction. This method can also improve the fraction of useful data available compared to the usual approach of discarding measurements identified as being contaminated by the effects of aerosols.

UR - http://www.scopus.com/inward/record.url?scp=85059942766&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059942766&partnerID=8YFLogxK

U2 - 10.1016/j.rse.2019.01.009

DO - 10.1016/j.rse.2019.01.009

M3 - Article

AN - SCOPUS:85059942766

VL - 223

SP - 8

EP - 20

JO - Remote Sensing of Environment

JF - Remote Sensing of Environment

SN - 0034-4257

ER -