Imperial College London

Dr Helen Brindley

Faculty of Natural SciencesDepartment of Physics

Reader in Earth Observation
 
 
 
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Contact

 

+44 (0)20 7594 7673h.brindley

 
 
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Location

 

717Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Bellisario:2017:10.1002/2017JD027328,
author = {Bellisario, C and Brindley, H and Murray, J and Last, A and Pickering, J and Chawn, Harlow R and Fox, S and Fox, C and Newman, S and Smith, M and Anderson, D and Huang, X and Chen, X},
doi = {10.1002/2017JD027328},
journal = {Journal of Geophysical Research},
pages = {12152--12166},
title = {Retrievals of the Far Infrared surface emissivity over the Greenland Plateau using the Tropospheric Airborne Fourier Transform Spectrometer (TAFTS).},
url = {http://dx.doi.org/10.1002/2017JD027328},
volume = {122},
year = {2017}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The Tropospheric Airborne Fourier Transform Spectrometer (TAFTS) measured near surface upwelling and downwelling radiances within the far infrared (FIR) over Greenland during two flights in March 2015. Here we exploit observations from one of these flights to provide in-situ estimates of FIR surface emissivity, encompassing the range 80-535 cm-1. The flight campaign and instrumental set-up is described as well as the retrieval method, including the quality control performed on the observations. The combination of measurement and atmospheric profile uncertainties means that the retrieved surface emissivity has the smallest estimated error over the range 360-535 cm-1, (18.7-27.8 μm), lying between 0.89 and 1 with an associated error which is of the order ± 0.06. Between 80 and 360 cm-1, the increasing opacity of the atmosphere, coupled with the uncertainty in the atmospheric state, means that the associated errors are larger and the emissivity values cannot be said to be distinct from 1. These FIR surface emissivity values are, to the best of our knowledge, the first ever from aircraft-based measurements. We have compared them to a recently developed theoretical database designed to predict the infrared surface emissivity of frozen surfaces. When considering the FIR alone, we are able to match the retrievals within uncertainties. However, when we include contemporaneous retrievals from the mid infrared (MIR), no single theoretical representation is able to capture the FIR and MIR behaviour simultaneously. Our results point towards the need for model improvement and further testing, ideally including in-situ characterisation of the underlying surface conditions.
AU - Bellisario,C
AU - Brindley,H
AU - Murray,J
AU - Last,A
AU - Pickering,J
AU - Chawn,Harlow R
AU - Fox,S
AU - Fox,C
AU - Newman,S
AU - Smith,M
AU - Anderson,D
AU - Huang,X
AU - Chen,X
DO - 10.1002/2017JD027328
EP - 12166
PY - 2017///
SN - 0148-0227
SP - 12152
TI - Retrievals of the Far Infrared surface emissivity over the Greenland Plateau using the Tropospheric Airborne Fourier Transform Spectrometer (TAFTS).
T2 - Journal of Geophysical Research
UR - http://dx.doi.org/10.1002/2017JD027328
UR - http://hdl.handle.net/10044/1/53067
VL - 122
ER -