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2016-05-20T14:30:30Z

Fog061: /* 2D-fields for uploading (monthly) */

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==Objectives of GREENICE AGCM experiments==

1. To better understand atmospheric impact of SST, sea ice, and snow cover

2. To assess the relative contributions of SST, sea ice, snow cover, and internal atmospheric dynamics in recent NH climate change

Models:

* Six models: CAM4(0.9x1.25deg.L26)/WACCM(L66), IFS(T255L91), ECHAM5(T106L31), IAP(1.4x1.4deg.L26), LMDZ (2.5x1.25deg.L39)

* Low and high top, low and high-horizontal resolution

==Experiments==

===Tier1===

* AGCM with full sea ice and SST variations

* AGCM with full sea ice and climatological SST variations

* Period 1982 to <s>2013</s> 2014 '''(revised in May2015)'''

* Number of ensemble: 20 member for each experiments to be determined by each group (e.g., different days in January 1981)

* Daily SST and sea ice variations will be used

===Tier 2===

* Case studies based on analysis of tier 1 experiments to better diagnose mechanisms

* Experiments to assess impact of snow cover variations

==Boundary conditions (BCs) and external forcing==

===Description===
* <s>'''Under maintainance on missing data periods (Asking NOAA to fix that. 26th March 2015 by Fumiaki Ogawa).'''</s> Now revised version is available.

* NOAA Optimum Interpolation 1/4 Degree Daily Sea Surface Temperature Analysis – version2, AVHRR-only product. This extends from September 2001 till present. The sea ice for 1981-2004 is from Cavalieri et al. [1997,2005]. The sea ice from 2005 to present is from Grumbine et al. [1998].

* Reference for the data Reynolds et al. [2007].

* Transient forcing following CMIP5 protocol. Specifically, "historical" until the end of 2005 while RCP8.5 from 2006 onward.

* Boundary conditions for the experiments with observed varying SIC and climatological SST follows Screen et al. [2013]: In any grid box north of 40N, if the daily mean SIC deviated from daily climatology by > 10%, the grid box was set to observed SIC and SST. All the grid boxes south of 40N and at grid boxes north of 40N where the daily mean sea ice concentration was within 10% of the climatological daily mean, observed SIC and climatological SST were used.

* NOAA data are provided from http://www.ncdc.noaa.gov/sst/index.php; 1982~<s>2013</s> 2014 was used to prepare the BCs.

* '''NOAA original BC data has error''', therefore year-to-year daily anomaly was linearly interpolated 29Nov1987-18Jan1988 (SIC) and 27Apr2009-19May2009 (SST&SIC) for the GREENICE experiments.

* BC data can be downloaded from the links below.

===Download BCs===

* '''Hexagon'''
hexagon.bccs.uib.no:/work/shared/nn9039k/GREENICE/OISST/OISST.GREENICE-AGCM.sstice.nc (SST clim)

hexagon.bccs.uib.no:/work/shared/nn9039k/GREENICE/OISST/OISST.sstice.nc

* '''NorStore'''
norstore.uio.no:/projects/NS9039K/shared/GREENICE/OISST/OISST.GREENICE-AGCM.sstice.nc

norstore.uio.no:/projects/NS9039K/shared/GREENICE/OISST/OISST.sstice.nc

* '''Online'''

http://ns9039k.norstore.uio.no/GREENICE-OISST/OISST.GREENICE-AGCM.sstice.nc

http://ns9039k.norstore.uio.no/GREENICE-OISST/OISST.sstice.nc

http://ns9039k.norstore.uio.no/GREENICE-OISST/README (currently a place holder)

==Some specific issues to be addressed by groups==

* Role of stratosphere-troposphere interaction at medium horizontal resolution ~1deg by comparing low versus high top simulations with daily SST and SIC data (UiB/NERSC)

==Output variables==

To be made available by each modeling group.

===3D-fields for uploading (monthly)===

* temperature
(name: ta)

* wind u, v
(name: ua, va)

* humidity
(name: hur)

* vertical velocity
(name: wap)

* GPH
(name: zg)

<s>* liquid water cloud, ice water cloud (monthly means)</s>

{| class="wikitable"
|+ 3D variable- Summary
! description || variable name !! unit !! note
|-
| temperature || ta || K ||
|-
| u wind || ua || m/s || positive for eastward
|-
| v wind || va || m/s || positive for northward
|-
| humidity || hur || % ||
|-
| vertical velocity || wap || Pa/s || negative for upward motion
|-
| GPH || zg || m ||
|}

===2D-fields for uploading (monthly)===

* SLP

* surface pressure

* all radiation components (<s>both clear and</s> all sky fluxes; longwave, shortwave TOA and surface)

* evaporation

<s>* daily max/min temperature</s>

* surface temperature

* 10m wind

* cloud cover (total, low, medium, high)

<s>* Cloud liquid water content</s>

<s>* cloud ice water content</s>

<s>* total column water</s>

<s>* total column water vapor</s>

<s>* soil temperature (several layers)</s>

<s>* soil wetness (several layers)</s>

<s>* runoff (surface and deep)</s>

* snow cover

* snow depth and density or liquid water equivalent.

* Total precipitation

* T2m

* Surface fluxes (upward latent, upward sensible, eastward&downward wind stress, northward&downward wind stress)

* Precipitation (large scale, convective, snow)

* SST and SIC in the model resolution

{| class="wikitable"
|+ 2D variable- Summary for uploading monthly data
! description || variable name !! unit !! note
|-
| SLP || psl || Pa || not hPa
|-
| Surface pressure || ps || Pa || not hPa
|-
| Radiation, Longwave, Downward, Surface || rlds || W/m2 || positive for downward
|-
| Radiation, Longwave, Upward, Surface || rlus || W/m2 || positive for upward
|-
| Radiation, Shortwave, Downward, Surface || rsds || W/m2 || positive for downward
|-
| Radiation, Shortwave, Upward, Surface || rsus || W/m2 || positive for upward
|-
| Radiation, Longwave, Upward, TOA || rlut || W/m2 || positive for upward
|-
| Radiation, Shortwave, Downward, TOA || rsdt || W/m2 || positive for downward
|-
| Radiation, Shortwave, Upward, TOA || rsut || W/m2 || positive for upward
|-
| Evaporation || evspsbl || kg/m2/s ||
|-
| Surface temperature || ts || K || not Celcius
|-
| 10m u wind || uas || m/s ||
|-
| 10m v wind || vas || m/s ||
|-
| Cloud cover, Total || clt || % ||
|-
| Cloud cover, Low-level || cll || % ||
|-
| Cloud cover, Mid-level || clm || % ||
|-
| Cloud cover, High-level || clh || % ||
|-
| Snow cover || snc || % ||
|-
| Snow liquid water equivalent || lwsnl || kg/m2 ||
|-
| Precipitation, Total || pr || kg/m2/s ||
|-
| Precipitation, Large Scale || prcprof || kg/m2/s ||
|-
| Precipitation, Convective || prlprof || kg/m2/s ||
|-
| Precipitation, Snow || prsn || kg/m2/s ||
|-
| 2m tempareture || tas || K || not Celcius
|-
| Upward Heat Flux, Latent, Surface || hfls || m || positive for upward
|-
| Upward Heat Flux, Sensible, Surface || hfss || m || positive for upward
|-
| Surface downward U wind stress || tauu || m || positive for eastward
|-
| Surface downward V wind stress || tauv || m || positive for northward
|-
| Prescribed SST || tos || K || not Celcius. Name is not SST
|-
| Prescribed SIC || sic || % ||
|}

===3D-fields (daily)===

* temperature

* wind u, v

* humidity

* vertical velocity

* GPH

* liquid water cloud, ice water cloud (monthly means)

===2D-fields (daily)===

* SLP

* surface pressure

* all radiation components (both clear and all sky fluxes)

* evaporation

* daily max/min temperature

* surface temperature

* 10m wind

* cloud cover (total, low, medium, high)

* Cloud liquid water content

* cloud ice water content

* total column water

* total column water vapor

* soil temperature (several layers)

* soil wetness (several layers)

* runoff (surface and deep)

* snow cover

* snow depth and density or liquid water equivalent.

* Total precipitation

* T2m

* Surface fluxes (latent, sensible, momentum)

* Precipitation (large scale, convective, snow)

===2D fields at 3hrly frequency===

* T2m

* Surface fluxes (latent, sensible, momentum)

* Precipitation (large scale, convective, snow)

* SLP

* 10m wind

'''Experiments to start <s>by mid-November</s> to be completed by the first year annual meeting''' <= delayed a little...

==Technical setup of AGCM==

===WACCM/CAM4(low-top)===

* by Fumiaki Ogawa (WACCM, UiB) and Lingling Suo (CAM4, NERSC)

* Output levels of WACCM are same as CAM4 below 100hPa, while split above there into 30 levels in total (originally 66).

==GREENICE output==

===WACCM/CAM4(low-top)===

* See the instruction to download the data : http://ns9064k.norstore.uio.no/README.shared

==References==

* Cavalieri D., C. Parkinson, P. Gloerson, and H.J. Zwally. 1997, updated 2005. Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I passive microwave data, June to September 2001. Boulder, CO, USA (from http://nsidc.org/data/nsidc-0051.html)

* Grumbine, R. W., 1996: Automated passive microwave sea ice concentration analysis at NCEP, 13pp. Unpublished manuscript available from NCEP/NWS/NOAA, 5200 Auth Road, Camp Springs, MD, 20746, USA. (from http://polar.ncep.noaa.gov/seaice/)

* Reynolds, R. W., T. M. Smith, C. Liu, D. B. Chelton, K. S. Casey, and M. G. Schlax (2007), Daily high-resolution-blended analyses for sea surface temperature, J Climate, 20(22), 5473-5496

* Screen, J. A., I. Simmonds, C. Deser, and R. Tomas (2013), The Atmospheric Response to Three Decades of Observed Arctic Sea Ice Loss, J Climate, 26(4), 1230-1248, 10.1175/jcli-d-12-00063.1.

== Contact informations==
Fumiaki.Ogawa@gfi.uib.no (about this wiki page), Noel.Keenlyside@gfi.uib.no (Other related questions)

Main Page

2014-12-22T13:04:13Z

Fog061:

==Objectives of GREENICE AGCM experiments==

1. To better understand atmospheric impact of SST, sea ice, and snow cover

2. To assess the relative contributions of SST, sea ice, snow cover, and internal atmospheric dynamics in recent NH climate change

Models:

* Four models: CAM4/WACM, IFS, ECHAM5, IAP

* Low and high top, low and high-horizontal resolution

==Experiments==

===Tier1===

* AGCM with full sea ice and SST variations

* AGCM with full sea ice and climatological SST variations

* Period 1981 to present

* Number of ensemble: 20 member for each experiments to be determined by each group (e.g., different days in January 1981)

* Daily SST and sea ice variations will be used

===Tier 2===

* Case studies based on analysis of tier 1 experiments to better diagnose mechanisms

* Experiments to assess impact of snow cover variations

==Boundary conditions and external forcing==

* NOAA Optimum Interpolation 1/4 Degree Daily Sea Surface Temperature Analysis – version2, AVHRR-only product. This extends from September 2001 till present. The sea ice for 1981-2004 is from Cavalieri et al. [1997,2005]. The sea ice from 2005 to present is from Grumbine et al. [1998].

* Download from http://www.ncdc.noaa.gov/sst/index.php

* Reference for the data Reynolds et al. [2007].

* Transient forcing following CMIP5 protocol. Specifically, "historical" until the end of 2005 while RCP8.5 from 2006 onward.

* Boundary conditions for the experiments with varying SIC and climatological SIC will follow Screen et al. [2013]: In any grid box north of 40N, if the daily mean SIC deviated from daily climatology by > 10%, the grid box was set to observed SIC and SST. Otherwise, climatological SIC and SST were used (this includes all grid boxes south of 40N). South of 40N and at grid boxes where the daily mean sea ice concentration was within 10% of the climatological daily mean, the climatological daily sea ice concentration and/or SST values were used.

==Some specific issues to be addressed by groups==

* Impact of daily versus monthly mean SST and SIC data in simulations at relatively high-horizontal resolution T255 (SMHI/DMI)

* Role of stratosphere-troposphere interaction at medium horizontal resolution ~1deg by comparing low versus high top simulations with daily SST and SIC data (UiB/NERSC)

==Output variables==

To be made available by each modeling group.

===3D-fields (daily)===

* temperature

* wind u, v

* humidity

* vertical velocity

* GPH

* liquid water cloud, ice water cloud (monthly means)

===2D-fields (daily)===

* SLP

* surface pressure

* all radiation components (both clear and all sky fluxes)

* evaporation

* daily max/min temperature

* surface temperature

* 10m wind

* cloud cover (total, low, medium, high)

* Cloud liquid water content

* cloud ice water content

* total column water

* total column water vapor

* soil temperature (several layers)

* soil wetness (several layers)

* runoff (surface and deep)

* snow cover

* snow depth and density or liquid water equivalent.

* Total precipitation

* T2m

===2D fields at 3hrly frequency===

* T2m

* Surface fluxes (latent, sensible, momentum)

* Precipitation (large scale, convective, snow)

'''Experiments to start by mid-November to be completed by the first year annual meeting'''

==Download boundary conditions==

===Hexagon===
hexagon.bccs.uib.no:/work/shared/nn9039k/GREENICE/OISST/OISST.GREENICE-AGCM.sstice.nc (SST clim)

hexagon.bccs.uib.no:/work/shared/nn9039k/GREENICE/OISST/OISST.sstice.nc

===NorStore===
norstore.uio.no:/projects/NS9039K/shared/GREENICE/OISST/OISST.GREENICE-AGCM.sstice.nc

norstore.uio.no:/projects/NS9039K/shared/GREENICE/OISST/OISST.sstice.nc

===Online===
http://noresg.norstore.uio.no/thredds/fileServer/esg_dataroot/ns9039k/GREENICE-OISST/OISST.GREENICE-AGCM.sstice.nc

http://noresg.norstore.uio.no/thredds/fileServer/esg_dataroot/ns9039k/GREENICE-OISST/OISST.sstice.nc

http://noresg.norstore.uio.no/thredds/fileServer/esg_dataroot/ns9039k/GREENICE-OISST/README (currently a place holder)

==Technical setup of AGCM==

===WACCM/CAM4(low-top)===

* by Fumiaki Ogawa (WACCM, GFI) and Lingling Suo (CAM4, NERSC)

In progress...

==References==

* Cavalieri D., C. Parkinson, P. Gloerson, and H.J. Zwally. 1997, updated 2005. Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I passive microwave data, June to September 2001. Boulder, CO, USA (from http://nsidc.org/data/nsidc-0051.html)

* Grumbine, R. W., 1996: Automated passive microwave sea ice concentration analysis at NCEP, 13pp. Unpublished manuscript available from NCEP/NWS/NOAA, 5200 Auth Road, Camp Springs, MD, 20746, USA. (from http://polar.ncep.noaa.gov/seaice/)

* Reynolds, R. W., T. M. Smith, C. Liu, D. B. Chelton, K. S. Casey, and M. G. Schlax (2007), Daily high-resolution-blended analyses for sea surface temperature, J Climate, 20(22), 5473-5496

* Screen, J. A., I. Simmonds, C. Deser, and R. Tomas (2013), The Atmospheric Response to Three Decades of Observed Arctic Sea Ice Loss, J Climate, 26(4), 1230-1248, 10.1175/jcli-d-12-00063.1.

== Contact informations==
Fumiaki.Ogawa@gfi.uib.no (about this wiki page), Noel.Keenlyside@gfi.uib.no (Other related questions)

== Editing this page==
Feel free to improve this wiki page !! Refer to:
* [//meta.wikimedia.org/wiki/Help:Contents User's Guide] for information on using the wiki software.
* [//www.mediawiki.org/wiki/Manual:Configuration_settings Configuration settings list]
* [//www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
* [//lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]

2014-12-22T12:51:20Z

Fog061:

==Objectives of GREENICE AGCM experiments==

1. To better understand atmospheric impact of SST, sea ice, and snow cover

2. To assess the relative contributions of SST, sea ice, snow cover, and internal atmospheric dynamics in recent NH climate change

Models:

* Four models: CAM4/WACM, IFS, ECHAM5, IAP

* Low and high top, low and high-horizontal resolution

==Experiments==

===Tier1===

* AGCM with full sea ice and SST variations

* AGCM with full sea ice and climatological SST variations

* Period 1981 to present

* Number of ensemble: 20 member for each experiments to be determined by each group (e.g., different days in January 1981)

* Daily SST and sea ice variations will be used

===Tier 2===

* Case studies based on analysis of tier 1 experiments to better diagnose mechanisms

* Experiments to assess impact of snow cover variations

==Boundary conditions and external forcing==

* NOAA Optimum Interpolation 1/4 Degree Daily Sea Surface Temperature Analysis – version2, AVHRR-only product. This extends from September 2001 till present. The sea ice for 1981-2004 is from Cavalieri et al. [1997,2005]. The sea ice from 2005 to present is from Grumbine et al. [1998].

* Download from http://www.ncdc.noaa.gov/sst/index.php

* Reference for the data Reynolds et al. [2007].

* Transient forcing following CMIP5 protocol. Specifically, "historical" until the end of 2005 while RCP8.5 from 2006 onward.

* Boundary conditions for the experiments with varying SIC and climatological SIC will follow Screen et al. [2013]: In any grid box north of 40N, if the daily mean SIC deviated from daily climatology by > 10%, the grid box was set to observed SIC and SST. Otherwise, climatological SIC and SST were used (this includes all grid boxes south of 40N). South of 40N and at grid boxes where the daily mean sea ice concentration was within 10% of the climatological daily mean, the climatological daily sea ice concentration and/or SST values were used.

==Some specific issues to be addressed by groups==

* Impact of daily versus monthly mean SST and SIC data in simulations at relatively high-horizontal resolution T255 (SMHI/DMI)

* Role of stratosphere-troposphere interaction at medium horizontal resolution ~1deg by comparing low versus high top simulations with daily SST and SIC data (UiB/NERSC)

==Output variables==

To be made available by each modeling group.

===3D-fields (daily)===

* temperature

* wind u, v

* humidity

* vertical velocity

* GPH

* liquid water cloud, ice water cloud (monthly means)

===2D-fields (daily)===

* SLP

* surface pressure

* all radiation components (both clear and all sky fluxes)

* evaporation

* daily max/min temperature

* surface temperature

* 10m wind

* cloud cover (total, low, medium, high)

* Cloud liquid water content

* cloud ice water content

* total column water

* total column water vapor

* soil temperature (several layers)

* soil wetness (several layers)

* runoff (surface and deep)

* snow cover

* snow depth and density or liquid water equivalent.

* Total precipitation

* T2m

===2D fields at 3hrly frequency===

* T2m

* Surface fluxes (latent, sensible, momentum)

* Precipitation (large scale, convective, snow)

'''Experiments to start by mid-November to be completed by the first year annual meeting'''

==Download boundary conditions==

===Hexagon===
hexagon.bccs.uib.no:/work/shared/nn9039k/GREENICE/OISST/OISST.GREENICE-AGCM.sstice.nc (SST clim)

hexagon.bccs.uib.no:/work/shared/nn9039k/GREENICE/OISST/OISST.sstice.nc

===NorStore===
norstore.uio.no:/projects/NS9039K/shared/GREENICE/OISST/OISST.GREENICE-AGCM.sstice.nc

norstore.uio.no:/projects/NS9039K/shared/GREENICE/OISST/OISST.sstice.nc

===Online===
http://noresg.norstore.uio.no/thredds/fileServer/esg_dataroot/ns9039k/GREENICE-OISST/OISST.GREENICE-AGCM.sstice.nc

http://noresg.norstore.uio.no/thredds/fileServer/esg_dataroot/ns9039k/GREENICE-OISST/OISST.sstice.nc

http://noresg.norstore.uio.no/thredds/fileServer/esg_dataroot/ns9039k/GREENICE-OISST/README (currently a place holder)

==Technical setup of AGCM==

===WACCM/CAM4(low-top)===

* by Fumiaki Ogawa (WACCM, GFI) and Lingling Suo (CAM4, NERSC)

In progress...

==References==

* Cavalieri D., C. Parkinson, P. Gloerson, and H.J. Zwally. 1997, updated 2005. Sea ice concentrations from Nimbus-7 SMMR and DMSP SSM/I passive microwave data, June to September 2001. Boulder, CO, USA (from http://nsidc.org/data/nsidc-0051.html)

* Grumbine, R. W., 1996: Automated passive microwave sea ice concentration analysis at NCEP, 13pp. Unpublished manuscript available from NCEP/NWS/NOAA, 5200 Auth Road, Camp Springs, MD, 20746, USA. (from http://polar.ncep.noaa.gov/seaice/)

* Reynolds, R. W., T. M. Smith, C. Liu, D. B. Chelton, K. S. Casey, and M. G. Schlax (2007), Daily high-resolution-blended analyses for sea surface temperature, J Climate, 20(22), 5473-5496

* Screen, J. A., I. Simmonds, C. Deser, and R. Tomas (2013), The Atmospheric Response to Three Decades of Observed Arctic Sea Ice Loss, J Climate, 26(4), 1230-1248, 10.1175/jcli-d-12-00063.1.

'''About wiki'''
* [//meta.wikimedia.org/wiki/Help:Contents User's Guide] for information on using the wiki software.
* [//www.mediawiki.org/wiki/Manual:Configuration_settings Configuration settings list]
* [//www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
* [//lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]