welcome to the third online presentation of the polarstern ... · third online presentation of the...
TRANSCRIPT
![Page 1: Welcome to the third Online Presentation of the Polarstern ... · third Online Presentation of the Polarstern-Project 2 May 2012 Peter Schmitt DWD - Langen . Agenda • Introduction](https://reader036.vdocuments.site/reader036/viewer/2022071022/5fd654712a18251a190a8f07/html5/thumbnails/1.jpg)
Welcome to the
third Online Presentation
of the Polarstern-Project
2 May 2012
Peter Schmitt
DWD - Langen
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Agenda
• Introduction of 3 important people on board
• Meteorological information 26-04 … 01.05.
• Focus to the Dust Storm
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Karl Bumke: Chief Scientist
from the Helmholtz-Center for
Ocean Research in Kiel
• Weather forecasts on board are very important for
planning the scientific work. The forecasts give us enough
time for an alternative planning
• Storms are the most impressive weather phenomona
• Twice I saw a green flash after sunset
• Weekly Reports from Karl Bumke
about working and living on board
http://www.awi.de/en/infrastructure/ships/polarstern/weekly_reports/
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Juliane Hempelt
from DWD
• Weather technician /
-observer
• She is responsible for
observations, SYNOP
Radiosoundings, TEMP
• She is the first time on
Polarstern
• Juliane crosses the first
time the equator …
• „I‘m looking foreward to
wave heights of more than
4 m.“
• She makes most of the
fotos for us.
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RV Polarstern: 3 Data Pools
• 10 minutes mean values, automatic dates
e.g. heigt, ceiling, pressure, precipitation, temperature, …
data managementsystem „DAVIS-SHIP“
• Weather observation every 3 hours (FM13 Synop) for
GTS, many observations with eyes, e.g. ice coverage
• Radiosoundings: per day 1 or 2,
in this cruise 1: every day at 12 UTC
Maximum heigt: 25 – 37 km
Sometimes extra soundings with smaller
ballons for the briefing of helicopter pilots,
mostly in the Arcic and Antarctic.
.
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Wind
Grafical exposure with the position of the measurements
Wind Global radiation Precipitation Moisture, Temperature g
Visibility Ceiling Weather station
Balloon hall Sea level
Water temperature
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• Meteorologist (forecaster)
• First time on Polarstern
2006
• On the first cruise he saw
wave heights up to 15 m.
• In the Arctic and Antarctic
he is also an aviation
forecaster for the
helicopter.
• The meteorologist is
always on duty
Max Miller
from DWD
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Training Center
In Langen
Big E-Mail packet for
many people
Internet
EUMETRAIN
AWI
Fütterer, Fahrbach: Polarstern:
Permanent Line from Polarstern to AWI
in Bremerhaven.
But the quality is not constant, because the
vessel is in motion.
Data path from Polarstern to EUMETRAIN
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01 May, 12 UTC
26 April, 12 UTC
26 April, 12 UTC: Polarstern is still sailing the southeast trade winds. Southeast 5 to 6 Bft. Good visibility, isolated showers, swell 2 to 2.5 m.
equator
20°N
Meteorological information from 26 April
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1-hourly Routine Synoptic Observations
Polarstern (DBLK)
SE Trade Winds
NE Trade Winds
ITCZ
90°
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Vertical profile of the Trade wind inversion
DBLK 26121 99050 50266 41598 21211 10275 20228 40127 52008 70300 82230 22282 04279 20402 310// 40703 =
Please decode this
cloud group in
FM13 Synop (blue
background)
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Vertical profile of the Trade wind inversion
DBLK 26121 99050 50266 41598 21211 10275 20228 40127 52008 70300 82230 22282 04279 20402 310// 40703 =
Cloud amount: 2/8 Low Clouds: Cumulus mediocris or Cumulus congestus Medium Level Clouds: Altocumulus translucidus
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01 May, 12 UTC
26 April, 12 UTC
27 April, 12 UTC: Polarstern is entering the inter tropical convergence zone. Southeast to east 4 to 5 Bft. Good visibility, reduced by showers or thunderstorms. Swell 1.5 to 2 m. 28 April, 12 UTC: Polarstern is crossing the inter tropical convergence zone and will approach the northeast trade wind zone. East to northeast around 4 Bft. Good visibility, reduced by some showers or thunderstorms. Swell around 1.5 m.
28 April, 12 UTC equator
20°N
27 April, 12 UTC
Meteorological information from 27 to 28 April
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27-04-2012, 12 UTC, RGB Severe Convection, ASCAT
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What shows the yellow colour?
a) big ice particle b) small ice particle c) cold temperature
27-04-2012, 12 UTC, RGB Severe Convection, ASCAT
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What shows the yellow colour?
a) big ice particle b) small ice particle c) cold temperature
27-04-2012, 12 UTC, RGB Severe Convection, ASCAT
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27-04-2012, 12 UTC, OSI-SAF: SST, Synop
DBLK 27121 99018 50254 41598 21408 10278 20229 40118 52010
70200 82200 22283 04278 20402 312// 40803 =
What is the measurement of water temperature on Polarstern?
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27-04-2012, 12 UTC, OSI-SAF: SST, Synop
DBLK 27121 99018 50254 41598 21408 10278 20229 40118 52010
70200 82200 22283 04278 20402 312// 40803 =
What is the measurement of water temperature on Polarstern?
27,8°C
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28-04-2012, 18 UTC, OSI-SAF: SST, See currents
Brazil Benguela
Canary
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28-04-2012, 18 UTC, Severe Convection RGB
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28-04-2012, 18 UTC, Dust RGB
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28-04-2012, 18 UTC
13 km
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28-04-2012
- no TS observed in the area of ITCZ
- only during the night lightning
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01 May, 12 UTC
29 April, 12 UTC: Polarstern is entering the northeast trade wind zone. Northeast to north 3, increasing 4 to 5 Bft. Good visibility, risk for isolated showers, swell around 1.5 m. 30 April, 12 UTC: Polarstern is sailing the northeast trade winds. Northeast to north 4 to 5, increasing 5 to 6 Bft. Temporarily hazy, swell around 2 m.
29 April, 12 UTC 30 April, 12 UTC
equator
20°N
Meteorological information from
29 April to 1 May
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29-04-2012, 12 UTC
Dewpoint Temperature [°C]
Dewpoint
Depression [K]
36.1 -0.8
32.7 24.5
26.9 22.0
36.1 -0.8
32.7 24.5
26.9 22.0
44.2 7.8
44.2 7.8
30.1 -0.6
30.1 -0.6
Dust RGB
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30-04-2012, 12 UTC
Dust RGB 3 dust areas in Africa
(dust in the air)
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30-04-2012, 12 UTC
Dust RGB, 30-04-2012, 18 UTC
Dust in the air (pink colour), spreading from Senegal/Guinea in westerly directions
Nat.Col.RGB, 30-04-2012, 18 UTC
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15 UTC
18 UTC
12 UTC
09 UTC
06 UTC
03 UTC
Dust RGB, 30-04-2012, 03 UTC – 18 UTC
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30-04-2012 The dust is falling out without shower, deposits on the staff
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09 UTC
06 UTC
03 UTC
00 UTC
21 UTC
Dust RGB, 30-04 21 UTC – 01-05 12 UTC
12 UTC
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DBLK 01121 99124 70222 41/96 90210 10233 20189 40141 58001 70900 89/// 22282 04229 20301 335// 40904 =
Ask yourself:
What means the
red character?
01-05-2012
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DBLK 01121 99124 70222 41/96 90210 10233 20189 40141 58001 70900 89/// 22282 04229 20301 335// 40904 =
Dust or sand storm
4 km visibility
01-05-2012
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Conceptual model of Saharan Air Layer (SAL)
• 1500 – 6000 m with large amounts of mineral dust
• Dry air and strong winds (10-25 m/s)
• African Easterly Jet with wind speeds maximize at about 650 hPa
COMET
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Conceptual model of Saharan Air Layer (SAL)
• Most over the Sahara Dessert during late spring, summer
• Usually it moves west over the tropical Atlantic
• The image shows a winter dust storm, moving west from Africa
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I hope we meet
us on the virtual
trip from Chile
to Germany!
http://eumetrain.org
Thank you!
Peter Schmitt
Thank you Juliane Hempelt and Max Miller
for more than 60 E-Mails and information.
Have a good remaining trip to Bremerhaven
Peter Schmitt, DWD-Langen