Combining High Frequency Microwave Radiometer Surface … · 2020-02-06 · 11/21/2008...
11/21/2008 제9회 기상레이더 워크숍 Combining Satellite High‐Frequency Microwave d f l d d Radiometer & Surface Cloud Radar Data for Determination of Large ‐Scale 3‐D Cloud IWC 서 은경 공주대학교 지구과학교육과 Objective: To retrieve large‐scale 3‐D cloud IWC by combining data from NOAA satellite Advanced Microwave Sounding Unit‐B TBs and ground‐based cloud radar
Combining High Frequency Microwave Radiometer Surface … · 2020-02-06 · 11/21/2008 제9회기상레이더워크숍 Combining Satellite High‐Frequency Microwave Radiometer &
Text of Combining High Frequency Microwave Radiometer Surface … · 2020-02-06 · 11/21/2008...
Combining Satellite High‐Frequency Microwave d f l d dRadiometer & Surface Cloud Radar Data
for Determination of Large ‐Scale 3‐D Cloud IWC
Objective: To retrieve large‐scale 3‐D cloud IWC by combiningdata from NOAA satellite Advanced Microwave Sounding Unit‐B TBs and gground‐based cloud radar
Objectives and Approach
How to construct a supporting database from radar for satellite retrieval?
Importance of database: manifolds problem
How to make a consistent framework btw Radar and Satellite?
From point‐ to area‐measurement in a consistent framework‐ Ice particle Design‐ Radar Reflectivity – IWC RelationRadar Reflectivity IWC Relation‐ Construction of vertical Ice Clouds ‐ TB‐IWP Relations at AMSU‐B channels TB IWP R l ti TB EOF d i‐ TB‐IWP Relations on TB EOF domain
Comparison of MMCR and AMSU‐B IWC profiles
Single Column Models (supported by the )Atmospheric Radiation Measurement) are used
to test physical parameterizations. As forcing terms, SCMs need advection tendency of ycondensates besides advections of T, q, …
Point measurements of cloud water alone are not sufficient to derive these advection terms
Satellite data provide areal coverage of water condensates can potentially be used to
co de sa es ca po e a y be used oderive these terms (together with other data)
Objectives and Approach
ObjectivesB bi i f d d t llit d t
By combining surface radar and satellite data,‐ Ice water path over a large area‐ Vertical ice water content distribution over a large area3 D ice ater content distribution ‐ 3‐D ice water content distribution can be utilized to calculate ice water advection terms for single column model inputs
Approach ‐ Surface radar (MMCR) provides detailed, high‐quality characteristicsof vertical ice water content distributionof vertical ice water content distribution‐ Satellite (NOAA AMSU‐B) provides broad horizontal coverage‐ Use surface radar data to generate database for satellite retrievals,and then use satellite data to broaden the area coverageand then use satellite data to broaden the area coverage
From point‐measurement to area measurement in a consistent frameworkf
How to construct a supporting databasepp gfor satellite retrieval?
Observations?Linkage btw TB ‐ Ice
No ice IceIce Consistency check
TB and TB ?
To overcome the lack of in situ observations of IWC profiles, we take the advantage of surface radar observations
Importance of database: manifolds problemp f f p
i l i
Ch 5 Ch 5
Ch 2 Ch 2
Ch 3 Ch 4 Ch 3 Ch 4
How to make a consistent framework bt R d d S t llit ? ( )btw Radar and Satellite? (1)
share the same microphysical and radiative properties.are looking at the same clouds.
observed MMCR profiles (solid lines) and the generated radar reflectivity profiles (dotted lines). The first and second numbers in the bottom of (c-f)denote the eigenvalues for the observed and generated radar reflectivity profiles.
From point‐ to area‐measurement in a consistent frameworkT IWP R l i TB EOF d iTB‐IWP Relations on TB EOF domain
Figure. Large circles denote AMSU‐B‐TB's at the ARM SGP site. Small circles and crosses represent AMSU‐B‐TB's, whose departure from clear‐sky background brightness represent AMSU B TB s, whose departure from clear sky background brightness temperatures at 89 GHz are between 25 K and 50 K and greater than 50 K, respectively, over a 10 deg x 10 deg box centered at the SGP site during March 2003.
Comparison of MMCR and AMSU‐B IWC profilesp f p f
Satellite retrievals MMCR retrievals
A framework to retrieve ice water path over a broad area is presented b b b f f l d d d llby combining observations of a surface cloud radar and satellite microwave measurements in a physically consistent way.
F t ti f d l d t b thi t d d t d l For construction of model database, this study adapted newly available ice microphysical properties from recent in situ observations and treated the single scattering properties based on DDA simulations of realistic nonspherical ice particles of realistic nonspherical ice particles.
A new radar reflectivity‐ice water content relation ( ) was derived