A description of the H₂O absorption in the 3−5 μm spectral region in violation of the long-wave approximation in line wings

Abstract

The self-broadened H 2 O continuum absorption data for the 3−5 μm window available in the literature are described in the framework of asymptotic line wing theory. Use is made of a diffusion model taking into account violation of the long-wave approximation in spectral line wings.

Spectral line shape and absorption in atmospheric windows

“…Âûõîä áûë íàéäåí íà ïóòè îòêàçà îò äëèííîâîëíîâîãî ïðèáëèaeåíèÿ äëÿ öåíòðîâ ìàññ ìîëåêóë. Ýòîò âàðèàíò àñèìïòîòè÷åñêîé òåîðèè êðûëüåâ ëèíèé áûë èñïîëüçîâàí â ðàñ÷åòå êîíòèíóàëüíîãî ïîãëîùåíèÿ âîäÿíûì ïàðîì äëÿ èíòåðâàëîâ 8-12 [24] è 3-5 ìêì [53].…”

“…Ïðè îïèñàíèè òåìïåðàòóðíîé çàâèñèìîñòè ïîãëîùåíèÿ êâàíòîâûé ïîòåíöèàë íå ìåíÿåòñÿ â ïðåäåëàõ ðàññìàòðèâàåìîãî ñïåêòðàëüíîãî èíòåðâàëà. Ñðàâíåíèå êâàíòîâîãî ïîòåíöèàëà ñ äàííûìè èç äðóãèõ ýêñïåðèìåíòîâ çàòðóäíèòåëüíî, òàê êàê ýòîò ïîòåíöèàë [53,54] ïîäðàçóìåâàåò âçàèìîäåéñòâèå ìåaeäó ìîëåêóëàìè, íàõîäÿùèìèñÿ â ðàçíûõ êîëåáàòåëüíûõ ñîñòîÿíèÿõ. Íåêîòîðûå âîçìîaeíîñòè äëÿ ñðàâíåíèÿ ìîãóò ïðåäîñòàâèòü äàííûå ïî ñäâèãàì ñïåêòðàëüíûõ ëèíèé, äëÿ èíòåðïðåòàöèè êîòîðûõ òàêaeå îêàçàëîñü íåîáõîäèìûì ó÷èòûâàòü êîëåáàòåëüíóþ çàâèñèìîñòü ïîòåíöèàëîâ ÌÌ cì., íàïðèìåð,  [55] .…”