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Inferring atmospheric dynamics from aerosol observations in 4D-Var
ID
Zaplotnik, Žiga
(
Avtor
),
ID
Žagar, Nedjeljka
(
Avtor
),
ID
Benedetti, Angela
(
Avtor
),
ID
Semane, Noureddine
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(5,60 MB)
MD5: 13B116946FC82F9FB86E7E91B461BD23
URL - Izvorni URL, za dostop obiščite
https://rmets.onlinelibrary.wiley.com/doi/epdf/10.1002/qj.3743
Galerija slik
Izvleček
The paper explores the potential of aerosol observations to provide wind information in four-dimensional variational data assimilation (4D-Var). It is shown that the relative horizontal gradients, crucial for the wind extraction from tracers, are on average greater for the aerosol mixing ratio than for the specific humidity, whose observations are known to provide significant information on the wind field. The aerosols potential to infer atmospheric dynamics is investigated in the tropics where the wind information is most critical. An intermediate-complexity incremental 4D-Var system MADDAM has been developed with a forecast model that simulates most dominant processes involving moisture, aerosols and dynamics: the nonlinear advection, condensation andwet deposition. The results of 4D-Var experiments reveal a detrimental impact of saturation-related nonlinearities and aerosol wet deposition on the extraction of wind from aerosol data. The fraternal-twin experiments show about 30% smaller impact of the aerosol data on the wind analysis compared to humidity data, mainly due to the greater aerosol observation error and suboptimal background-error covariance model. However, the assimilation of aerosol data together with temperature and humidity observations shows a significant added value for the wind analyses.
Jezik:
Angleški jezik
Ključne besede:
meteorology
,
atmospheric physics
,
aerosols
,
4D-Var
,
wind
,
humidity
,
data assimilation
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FMF - Fakulteta za matematiko in fiziko
Status publikacije:
Objavljeno
Različica publikacije:
Recenzirani rokopis
Datum objave:
18.02.2020
Leto izida:
2020
Št. strani:
Str. 1403-1422
Številčenje:
Vol. 146, iss. 728
PID:
20.500.12556/RUL-161049-a7afe3c1-079c-6e4c-3306-a41d8fe40859
UDK:
551.501
ISSN pri članku:
0035-9009
DOI:
10.1002/qj.3743
COBISS.SI-ID:
387497
Datum objave v RUL:
06.09.2024
Število ogledov:
51
Število prenosov:
36
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Quarterly Journal of the Royal Meteorological Society
Skrajšan naslov:
Q. J. R. Meteorol. Soc.
Založnik:
Royal Meteorological Society
ISSN:
0035-9009
COBISS.SI-ID:
26227200
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
meteorologija
,
atmosferska fizika
,
aerosoli
,
4D-var
,
veter
,
vlažnost zraka
,
asimilacija podatkov
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