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MSLP, T2m, 10m winds, 6hrly RR (rainfall rate), do we have this? If not, accum. total precipitation ,
SST : from analysis, HRES, oper. ensemble and expt:gioi (to compare)
200, 500, 700, 850 hPa : Geopotential, temperature, potential temperature & , equivalent potential temperature, winds (U/V), relative humidity (rather than sp. hum.), @ 200, 500, 700, 850 hPavertical velocity (note: ENM suggested VV on 600hPa only)
850hPa only : absolute vorticity (not on any other levels)
925hPa additional winds & rel. humidity only (in addition to above levels)also 925hPa for winds & humidity only
PV + wind (U/V) @ 330 K isentrope (see Fig.10/13 in paper)
Geopotential/winds at 2PVU (do we archive these?)
Vertical x-sections
Vertical x-sections
Daily only (00Z)
Tropospheric pressure levels only (200hPa ->)
Fields: Potential temperature, potential vorticity, winds (normal winds preferred), relative humidity, vertical vel. -- needs reviewing, would need all pressure levels & will be too much data? PV + winds would be priority.
Request is for: all levels for : PV, winds, vertical velocity (if poss), rel. humidity, potential temperature (last two if space permits).
Suggest: if data size is a problem, omit the reduced resolution uncertainty runs.
Good if students could use metview to plot x-section through centre of storm, finding the storm centre themselves, perhaps modifying macros themselves ?
If too much data, make the full level data only available at specific times (e.g. daily). Failing that pre-plot images.
Observational data
velocity.
An & all forecasts & all ensemble members (if space). Review if necessary.
Observational data
- if time and space only.possibly synop data to add to plot similar to fig2?
Data domain
Extract data similar to domain in figure 1 but suggest crop
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AN 15N - 65N / 20E
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60W (
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to capture Nadine track from 15th), FC 20N - 65N / 20E - 50W
Other data
Satellite images to be provided by ENM & included on VM. Due to licensing restrictions we can't provide the GRIB data on the VM.Perhaps we can overlay geotagged TIFs?
Plots
Icons
- 1x1, 2x2
- Difference maps (an-fc, ens-control)
- stamp maps
- RMSE curves geopotential (500hPa), RMSE plumes
- spaghetti plots
- nadine track icon
- PCA (new)
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Students should do at least:
- MSLP + 10m winds / T2m -> interesting for tracking Nadine & primary circulation+ overlay with 850hPa absolute vorticity + overlay with 700hPa rel. humidity -> Signatures at low levels of Nadine and disturbance associated with the cutoff low. Mid level humidity of the systems.
- Geopotential + temperature at 500hPa --> mid-trop localization of the cold cutoff and warm Nadine. On the deterministic forecast we should not see Nadine and the cutoff 'meeting' with Nadine moving eastward.
- Geopotential + temperature at 850hPa --> lower level conditions, detection of fronts
Equivalent potential temperature at 850 hPa + winds at 850 hPa + vertical velocity at 600hPa + MSLP in background --> focussing on the moist and warm air in the lower levels and the vertival motion. There should not be a strong horizontal temperature gradient around Nadine, the winds should be stronger for Nadine than for the cutoff.
10meter winds + 6hourly RR + MSLP in background --> We should see an impact on the RR over France around t+108h (cf Pantillon fig 2)
- 1.5 PVU geopotential + winds or 330K potential vorticity (PV) + winds --> upper level conditions, upper level jet and the cutoff signature in PV, interaction between Nadine and the trough
Vertical x-sections
Vertical x-sections in the cutoff and in Nadine. Students should do at least:
- PV + winds (preferably normal winds) + potential temperature --> to look at the cold core or warm core structure of the systems on the vertical and the signature in PV and winds.
- PV + relative humidity + vertical velocity --> a more classical x-section that we use to see if a PV anomaly is accompanied with vertical motion or not.
Q. How to plot ensembles? All ensemble members or cluster x-section?
From Frédéric: (15/Mar)
SCM:
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