Results 31 to 40 of about 547,637 (160)

Westward Acceleration of Tropical Stratopause Zonal Winds During Major Sudden Stratospheric Warming Events

Geophysical Research Letters, 2020
The tropical Mesosphere‐Lower Thermosphere‐Ionosphere system is found to show significant variabilities during Sudden Stratospheric Warming (SSW) events.
N. Koushik, Karanam Kishore Kumar, Tarique A. Siddiqui   +2 more
doaj   +1 more source

Blocking precursors to stratospheric sudden warming events [PDF]

, 2009
The primary causes for the onset of major, midwinter, stratospheric sudden warming events remain unclear. In this paper, we report that 25 of the 27 events objectively identified in the ERA-40 dataset for the period 1957–2001 are preceded by blocking ...
Davies, H. C., Martius, O., Polvani, L. M., Polvani, Lorenzo M., Martius, Olivia   +4 more
core   +2 more sources

Influence of January 2009 stratospheric warming on HF radio wave propagation in the low-latitude ionosphere

Solar-Terrestrial Physics, 2016
We have considered the influence of the January 23–27, 2009 sudden stratospheric warming (SSW) event on HF radio wave propagation in the equatorial ionosphere. This event took place during extremely low solar and geomagnetic activity.
Kotova D.S., Klimenko M.V., Klimenko V.V., Zakharov V.E., Bessarab F.S., Korenkov Yu.N.   +5 more
doaj   +1 more source

Multimodel climate and variability of the stratosphere [PDF]

, 2011
The stratospheric climate and variability from simulations of sixteen chemistry‐climate models is evaluated. On average the polar night jet is well reproduced though its variability is less well reproduced with a large spread between models.
T. Nakamura, Garny, Hella, Morgenstern, O, J.-F. Lamarque, Osprey, Scott, H. Teyssèdre, Eyring, V, M. Dameris, Hardiman, S. C., Garny, H., S. M. Osprey, Garcia, R., Kushner, PJ, J. Perlwitz, D. Smale, D. Plummer, Haynes, P.H., Charlton-Perez, AJ, Akiyoshi, H, J. Pyle, E. Rozanov, Nakamura, T, Akiyoshi, H., Charlton-Perez, A., Morgenstern, O., Perlwitz, J, Pyle, J, Butchart, N, Haynes, PH, M. Marchand, Lamarque, J-F, Y. Yamashita, Lamarque, J. F., Braesicke, P., Brühl, C., Baumgaertner, A., Kushner, P., Dameris, Martin, Kushner, P. J., Chipperfield, M., Butchart, Neal, Chipperfield, M, Wang, L., Joeckel, P, M. Sigmond, Tian, W., Wang, L, Bekki, S, Perlwitz, J., Dameris, M, Osprey, S. M., H. Akiyoshi, R. Garcia, V. Eyring, K. Krüger, Bekki, S., Eyring, V., A. Baumgaertner, Jöckel, P., Osprey, S., et, al., Rozanov, E, P. H. Haynes, M. Michou, Yamashita, Y, Plummer, D, S. Bekki, Scinocca, J, Newman, P. A., Shepherd, T. G., Marchand, M, Krüger, Kirstin, Eyring, Veronika, Dhomse, S, Butchart, N., D. Waugh, Haynes, P. H., Rozanov, E., Pawson, S., Lamarque, J.-F., Charlton-Perez, A. J., Osprey, SM, J. Austin, Newman, PA, Smale, D., Austin, J., Michou, M., Marchand, M., Garny, H, Newman, P., Hardiman, S., Waugh, D., Cionni, Irene, Teyssedre, H, J. Scinocca, Sigmond, M, A. J. Charlton-Perez, Waugh, D, P. J. Kushner, Bruehl, C, S. C. Hardiman, Braesicke, P, Smale, Dan, Marchand, Marion, K. Shibata, H. Garny, S. Pawson, Cionni, I., Sigmond, M., T. G. Shepherd, Hardiman, SC, C. Brühl, S. Dhomse, Baumgaertner, A, P. Braesicke, P. A. Newman, Shepherd, T., Scinocca, J., Bekki, Slimane, M. Chipperfield, I. Cionni, Garcia, R, Plummer, D., Dameris, M., Morgenstern, Olaf, Pawson, S, N. Butchart, Lamarque, J., Krueger, K, Dhomse, S., Yamashita, Y., Haynes, P., Austin, J, Smale, D, Tian, W, P. Jöckel, Pyle, J., Teyssèdre, H., L. Wang, O. Morgenstern, Charlton-Perez, Andrew J., Newman, P.A., Shibata, K, Krüger, K., W. Tian, Shibata, K., Hardiman, S.C., Shepherd, TG, Michou, M, Charlton-Perez, A.J., Jöckel, Patrick, Osprey, S.M., Nakamura, T., Michou, Martine, Cionni, I   +154 more
core   +2 more sources

The sudden stratospheric warming in January 2021 [PDF]

, 2021
Using the ERA5 reanalysis, sea surface temperature and sea ice observations, and the real-time multivariate Madden–Julian index, this study explores a sudden stratospheric warming (SSW) in January 2021, its favorable conditions, and the near surface ...
Liang, Zhuoqi, Lu, Qian, Liu, Siming, Guo, Dong, Wang, Chun, Rao, Jian, Luo, Jingjia, Wang, Tian   +7 more
core   +2 more sources

Relation between stratospheric sudden warming and the lunar effect on the equatorial electrojet based on Huancayo recordings [PDF]

Annales Geophysicae, 2015
It has been known for many decades that the lunar tidal influence in the equatorial electrojet (EEJ) is noticeably enhanced during Northern Hemisphere winters.
T. A. Siddiqui, T. A. Siddiqui, H. Lühr, C. Stolle, C. Stolle, J. Park, J. Park   +6 more
doaj   +1 more source

Atmospheric transport and critical layer mixing in the troposphere and stratosphere [PDF]

, 2012
This thesis aims to improve the understanding of transport and critical layer mixing in the troposphere and stratosphere. A dynamical approach is taken based on potential vorticity which has long been recognised as the essential field inducing the flow ...
Smy, Louise Ann
core   +2 more sources

Improved predictability of the troposphere using stratospheric final warmings [PDF]

, 2011
The final warming of the stratospheric polar vortex at the end of northern hemisphere winter is examined in ECMWF ERA-Interim reanalysis data and an ensemble of chemistry climate models, using 20 years of data from each.
Braesicke, Peter, Michou, M., Shaw, T., Peter Braesicke, Hardiman, S. C., Hardiman, S., Martyn Chipperfield, Akiyoshi, Hideharu, Garcia, Rolando R., Shaw, Tiffany A., Garcia, R., Hideharu Akiyoshi, Martin Dameris, Chipperfield, Martyn, Kiyotaka Shibata, Neal Butchart, Shaw, T. A., Hardiman, Steven, Tiffany A. Shaw, Slimane Bekki, Akiyoshi, H., Charlton-Perez, A., Baumgaertner, Andreas, Hardiman, Steven C., Braesicke, P., Dameris, Martin, Baumgaertner, A., Chipperfield, M., Garcia, R. R., Bekki, Slimane, Butchart, Neal, Eugene Rozanov, Charlton‐Perez, Andrew J., Butchart, Neil, Steven C. Hardiman, Dameris, M., Steven Pawson, Andrew J. Charlton-Perez, Bekki, S., Andreas Baumgaertner, Rozanov, Eugene, Martine Michou, Rolando R. Garcia, Charlton-Perez, Andrew J., Shibata, Kiyotaka, Shibata, K., Pawson, Steven, Butchart, N., Rozanov, E., Michou, Martine, Pawson, S., Charlton-Perez, A. J.   +51 more
core   +1 more source

Multi-Year Rayleigh Lidar Temperature Measurement of the Polar Middle Atmosphere at Chatanika [PDF]

EPJ Web of Conferences
We present Rayleigh density temperature lidar temperature measurements of the stratosphere and mesosphere that extends over 87 nights from September 2018 to April 2022 made at Chatanika, Alaska (65°N, 147°W).
Das Satyaki, Collins Richard, Li Jintai, Harvey V. Lynn, Thurairajah Brentha   +4 more
doaj   +1 more source

SD-WACCM-X 2020-2021 Sudden Stratospheric Warming

, 2022
Simulation output from the Specified Dynamics version of the Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (SD-WACCM-X) for the 2020-2021 sudden stratospheric warming (SSW) event.
Pedatella, Nicholas
core   +1 more source