التفاصيل البيبلوغرافية
| العنوان: |
Polar middle atmospheric responses to medium energy electron (MEE) precipitation using numerical model simulations |
| المؤلفون: |
Lee, J.-H. (Ji-Hee), Jee, G. (Geonhwa), Kwak, Y.-S. (Young-Sil), Hwang, H. (Heejin), Seppälä, A. (Annika), Song, I.-S. (In-Sun), Turunen, E. (Esa), Lee, D.-Y. (Dae-Young) |
| بيانات النشر: |
Multidisciplinary Digital Publishing Institute |
| سنة النشر: |
2021 |
| المجموعة: |
Jultika - University of Oulu repository / Oulun yliopiston julkaisuarkisto |
| مصطلحات موضوعية: |
energetic electron precipitation (EEP), medium energy electron (MEE), mesosphere, odd-hydrogen, odd-nitrogen, ozone loss |
| الوصف: |
Energetic particle precipitation (EPP) is known to be an important source of chemical changes in the polar middle atmosphere in winter. Recent modeling studies further suggest that chemical changes induced by EPP can also cause dynamic changes in the middle atmosphere. In this study, we investigated the atmospheric responses to the precipitation of medium-to-high energy electrons (MEEs) over the period 2005–2013 using the Specific Dynamics Whole Atmosphere Community Climate Model (SD-WACCM). Our results show that the MEE precipitation significantly increases the amounts of NOₓ and HOₓ, resulting in mesospheric and stratospheric ozone losses by up to 60% and 25% respectively during polar winter. The MEE-induced ozone loss generally increases the temperature in the lower mesosphere but decreases the temperature in the upper mesosphere with large year-to-year variability, not only by radiative effects but also by adiabatic effects. The adiabatic effects by meridional circulation changes may be dominant for the mesospheric temperature changes. In particular, the meridional circulation changes occasionally act in opposite ways to vary the temperature in terms of height variations, especially at around the solar minimum period with low geomagnetic activity, which cancels out the temperature changes to make the average small in the polar mesosphere for the 9-year period. |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| الإتاحة: |
http://urn.fi/urn:nbn:fi-fe2021043028110Test |
| حقوق: |
info:eu-repo/semantics/openAccess ; © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0Test/). ; https://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: |
edsbas.61CB31D8 |
| قاعدة البيانات: |
BASE |
