Nighttime O(<sup>1</sup>D) distributions in the mesopause region derived from SABER data
oleh: M. Yu. Kulikov, M. Yu. Kulikov, M. V. Belikovich
| Format: | Article |
|---|---|
| Diterbitkan: | Copernicus Publications 2020-07-01 |
Deskripsi
<p>In this study, the new source of O(<span class="inline-formula"><sup>1</sup>D</span>) in the mesopause region due to the process OH<span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M4" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>(</mo><mi mathvariant="italic">ν</mi><mo>≥</mo><mn mathvariant="normal">5</mn><mo>)</mo><mo>+</mo><mrow class="chem"><mi mathvariant="normal">O</mi></mrow><mo>(</mo><mrow class="chem"><msup><mi/><mn mathvariant="normal">3</mn></msup><mi mathvariant="normal">P</mi></mrow><mo>)</mo><mo>→</mo><mrow class="chem"><mi mathvariant="normal">OH</mi></mrow><mo>(</mo><mn mathvariant="normal">0</mn><mo>≤</mo><mi mathvariant="italic">ν</mi><msup><mi/><mo>′</mo></msup><mo>≤</mo><mi mathvariant="italic">ν</mi><mo>-</mo><mn mathvariant="normal">5</mn><mo>)</mo><mo>+</mo><mrow class="chem"><mi mathvariant="normal">O</mi></mrow><mo>(</mo><mrow class="chem"><msup><mi/><mn mathvariant="normal">1</mn></msup><mi mathvariant="normal">D</mi></mrow></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="210pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="83111bc2623d01eef96ebeacd768f95c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="angeo-38-815-2020-ie00001.svg" width="210pt" height="15pt" src="angeo-38-815-2020-ie00001.png"/></svg:svg></span></span>) is applied to SABER data to estimate the nighttime O(<span class="inline-formula"><sup>1</sup>D</span>) distributions for the years 2003–2005. It is found that O(<span class="inline-formula"><sup>1</sup>D</span>) evolutions in these years are very similar to each other. Depending on the month, monthly averaged O(<span class="inline-formula"><sup>1</sup>D</span>) distributions show two to four maxima with values up to 340 cm<span class="inline-formula"><sup>−3</sup></span> which are localized in height (at <span class="inline-formula">∼92</span>–96 km) and latitude (at <span class="inline-formula">∼20</span>–40 and <span class="inline-formula">∼60</span>–80<span class="inline-formula"><sup>∘</sup></span> S, N). Annually averaged distributions in 2003–2005 have one weak maximum at <span class="inline-formula">∼93</span> km and <span class="inline-formula">∼65</span><span class="inline-formula"><sup>∘</sup></span> S with values of 150–160 cm<span class="inline-formula"><sup>−3</sup></span> and three pronounced maxima (with values up to 230 cm<span class="inline-formula"><sup>−3</sup>)</span> at <span class="inline-formula">∼95</span> km and <span class="inline-formula">∼35</span><span class="inline-formula"><sup>∘</sup></span> S, at <span class="inline-formula">∼94</span> km and <span class="inline-formula">∼40</span><span class="inline-formula"><sup>∘</sup></span> N and at <span class="inline-formula">∼93</span> km and <span class="inline-formula">∼65</span>–75<span class="inline-formula"><sup>∘</sup></span> N, correspondingly. In general, there is slightly more O(<span class="inline-formula"><sup>1</sup>D</span>) in the Northern Hemisphere than in the Southern Hemisphere. The obtained results are a useful data set for subsequent estimation of nighttime O(<span class="inline-formula"><sup>1</sup>D</span>) influence on the chemistry of the mesopause region.</p>