Geoscience Reference
In-Depth Information
Table 13.1
Data types assimilated in NCODA 3DVAR with typical daily data counts. Note that
the profile data counts are for the entire profile. Profiles typically contain hundreds of levels that
are assimilated as unique latitude, longitude, level observations
Data type
Data source
Specifications
Number daily obs
Satellite SST
NOAA-18
NOAA-19
Infrared 2-km day, night
retrievals
4,800,000
NOAA-18
NOAA-19
Infrared 8-km day, night,
relaxed day retrievals
800,000
AMSR-E
Microwave 25-km day,
night retrievals
3,600,000
METOP-A
Infrared 2-km day, night
retrievals
15,000,000
METOP-A
Infrared 8-km day, night,
relaxed day retrievals
450,000
GOES E/W
Infrared 12-km day, night
retrievals
2,000,000
MeteoSat-2
Infrared 8-km day, night
retrievals
220,000
AATSR
Infrared 1-km day, night
retrievals
12,000,000
In Situ SST
Ships
Engine room intake
6,500
Hull contact sensor
1,000
Bucket temperature
100
CMAN Station
100
Drifting Buoy
34,000
Fixed Buoy
7,000
Satellite altimeter
Jason 1, 2
Envisat
SSHA
150,000
SWH
180,000
Sea ice concentration
DMSP F13, F14,
F15
SSM/I 25-km retrievals
900,000
DMSP F16, F17,
F18
SSMIS 25-km retrievals
1,200,000
Profiles
Drifting buoy
Temperature
50
Fixed buoy
1,200
Argo
600
XBT
100
TESAC (CTD)
3,500
Drifting buoy
Salinity
50
Fixed buoy
800
Argo
600
TESAC (CTD)
3,000
13.4.2
Profile Observations
Preparation of profile observations for the assimilation consists of several steps.
First, observed profiles are extended to the bottom using the model forecast. The
Search WWH ::
Custom Search