Can downwelling far-infrared radiances over Antarctica be estimated from mid-infrared information?

• Published in: Atmospheric Chemistry and Physics
• Main Authors: C. Bellisario, H. E. Brindley, S. F. B. Tett, R. Rizzi, G. Di Natale, L. Palchetti, G. Bianchini
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2019
• Subjects: Physics; QC1-999; Chemistry; QD1-999; Antarc*; Antarctica
• Online Access: https://doi.org/10.5194/acp-19-7927-2019; https://doaj.org/article/45db08f624484bb590da3e57d243d986

Far-infrared (FIR: <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">100</mn><mspace width="0.125em" linebreak="nobreak"/><mrow class="unit"><msup><mi mathvariant="normal">cm</mi><mrow><mo>-</mo><mn mathvariant="normal">1</mn></mrow></msup></mrow><mo><</mo><mtext>wavenumber</mtext></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="121pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="1368b7d9579ef3b9a97e6df034c9113a"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-19-7927-2019-ie00001.svg" width="121pt" height="13pt" src="acp-19-7927-2019-ie00001.png"/></svg:svg> , ν <667 cm −1 ) radiation emitted by the Earth and its atmosphere plays a key role in the Earth's energy budget. However, because of a lack of spectrally resolved measurements, radiation schemes in climate models suffer from a lack of constraint across this spectral range. Exploiting a method developed to estimate upwelling far-infrared radiation from mid-infrared (MIR: <math xmlns="http://www.w3.org/1998/Math/MathML" id="M4" display="inline" overflow="scroll" dspmath="mathml"><mrow><mn mathvariant="normal">667</mn><mspace width="0.125em" linebreak="nobreak"/><mrow class="unit"><msup><mi mathvariant="normal">cm</mi><mrow><mo>-</mo><mn mathvariant="normal">1</mn></mrow></msup></mrow><mo><</mo><mi mathvariant="italic">ν</mi><mo><</mo><mn mathvariant="normal">1400</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="101pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="ffea5bebe86a56cd11629887c3b6bb87"><svg:image ...