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High-Altitude (0-100 km) Global Atmospheric Reanalysis System: Description and Application to the 2014 Austral Winter of the Deep Propagating Gravity-Wave Experiment (DEEPWAVE)

Eckermann, Stephen D. and Ma, Jun and Hoppel, Karl W. and Kuhl, David D. and Allen, Douglas R. and Doyle, James A. and Viner, Kevin C. and Ruston, Benjamin C. and Baker, Nancy L. and Swadley, Steven D. and Whitcomb, Timothy R. and Reynolds, Carolyn A. and Xu, Liang and Kaifler, Natalie and Kaifler, Bernd and Reid, Iain M. and Murphy, Damian J. and Love, Peter T. (2018) High-Altitude (0-100 km) Global Atmospheric Reanalysis System: Description and Application to the 2014 Austral Winter of the Deep Propagating Gravity-Wave Experiment (DEEPWAVE). Monthly Weather Review, pp. 2639-2666. American Meteorological Society. DOI: 10.1175/MWR-D-17-0386.1 ISSN 0027-0644

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Official URL: https://journals.ametsoc.org/doi/abs/10.1175/MWR-D-17-0386.1

Abstract

A data assimilation system (DAS) is described for global atmospheric reanalysis from 0-100 km altitude. We apply it to the 2014 austral winter of DEEPWAVE, an international field campaign focused on gravity-wave dynamics from 0-100 km, where an absence of reanalysis above 60 km inhibits research. Four experiments were performed from April-September 2014 and assessed for reanalysis skill above 50 km. A four-dimensional variational (4DVAR) run specified initial background error covariances statically. A hybrid-4DVAR (HYBRID) run formed background error covariances from an 80-member forecast ensemble blended with a static estimate. Each configuration was run at low and high horizontal resolution. In addition to operational observations below 50 km, each experiment assimilated ~105 observations of the mesosphere and lower thermosphere (MLT) every 6 h. While all MLT reanalyses show skill relative to independent wind and temperature measurements, HYBRID outperforms 4DVAR. MLT fields at 1 h resolution (6 h analysis and 1–5 h forecasts) outperform 6 h analysis alone due to a migrating semidiurnal (SW2) tide that dominates MLT dynamics and is temporally aliased in 6 h time series. MLT reanalyses reproduce observed SW2 winds and temperatures, including phase structures and 10–15 day amplitude vacillations. The 0-100 km reanalyses reveal quasi-stationary planetary waves splitting the stratopause jet in July over New Zealand, decaying from 50–80 km then reintensifying above 80 km, most likely via MLT forcing due to zonal asymmetries in stratospheric gravity-wave filtering.

Item URL in elib:https://elib.dlr.de/120071/
Document Type:Article
Additional Information:AMS Open Access Option wurde gewählt; vgl. https://www.ametsoc.org/ams/index.cfm/publications/ethical-guidelines-and-ams-policies/open-access-for-ams-journals-and-bams/
Title:High-Altitude (0-100 km) Global Atmospheric Reanalysis System: Description and Application to the 2014 Austral Winter of the Deep Propagating Gravity-Wave Experiment (DEEPWAVE)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Eckermann, Stephen D.NRL, Washington, DC, USAhttps://orcid.org/0000-0002-8534-1909
Ma, JunComputational Physics, Inc., Springfield, VAUNSPECIFIED
Hoppel, Karl W.Remote Sensing Division, U.S. Naval Research Laboratory, Washington, DCUNSPECIFIED
Kuhl, David D.Remote Sensing Division, U.S. Naval Research Laboratory, Washington, DChttps://orcid.org/0000-0002-4842-0077
Allen, Douglas R.Remote Sensing Division, U.S. Naval Research Laboratory, Washington, DCUNSPECIFIED
Doyle, James A.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Viner, Kevin C.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Ruston, Benjamin C.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Baker, Nancy L.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Swadley, Steven D.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Whitcomb, Timothy R.Marine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Reynolds, Carolyn A.Naval Research Lab., Monterey, CA, USAUNSPECIFIED
Xu, LiangMarine Meteorology Division, U.S. Naval Research Laboratory, Monterey, CAUNSPECIFIED
Kaifler, NatalieDLR, IPAhttps://orcid.org/0000-0002-3118-6480
Kaifler, BerndDLR, IPAhttps://orcid.org/0000-0002-5891-242X
Reid, Iain M.University of Adelaide, Adelaide, Australiahttps://orcid.org/0000-0003-2340-9047
Murphy, Damian J.Australian Antarctic Division, Hobart, Tasmaniahttps://orcid.org/0000-0003-1738-5560
Love, Peter T.Australian Antarctic Division, Hobart, Tasmaniahttps://orcid.org/0000-0001-7840-0467
Date:May 2018
Journal or Publication Title:Monthly Weather Review
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:0
DOI :10.1175/MWR-D-17-0386.1
Page Range:pp. 2639-2666
Publisher:American Meteorological Society
ISSN:0027-0644
Status:Published
Keywords:DEEPWAVE, mesosphere
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):Vorhaben Mittlere Atmosphäre
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Kaifler, Dr. Natalie
Deposited On:23 May 2018 12:28
Last Modified:24 Jan 2020 12:11

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