Upload
omana
View
54
Download
0
Tags:
Embed Size (px)
DESCRIPTION
CalWater 2 Early Start G-IV Flights “AR Experiment” 3 – 25 Feb 2014. Ryan Spackman (STC/ESRL), Marty Ralph (Scripps), Chris Fairall (ESRL), Allen White (ESRL), Janet Intrieri (ESRL). Science Highlights. Science Priority – Evolution and Structure of ARs Targets : - PowerPoint PPT Presentation
Citation preview
Ryan Spackman (STC/ESRL), Marty Ralph (Scripps), Chris Fairall (ESRL), Allen White (ESRL), Janet Intrieri (ESRL)
CalWater 2 Early Start G-IV Flights
“AR Experiment”3 – 25 Feb 2014
Science Highlights
GFS Analysis5 - 10 Feb
2014
Science Priority – Evolution and Structure of ARs
Targets: 2 major landfalling AR events
along West Coast Tropical Moisture Export
(TMEs) events from Hawaii Poleward developing AR
between Hawaii and Alaska Occluded front in Gulf of AK
and midlatitude offshore AR between Hawaii and CA
Science Highlights
GFS Analysis5 - 10 Feb
2014
Tropical Moisture
Export Events18-19 Feb
Landfalling ARs
8 Research
Flights
7-15, 24 Feb
Developing ARs and Extratropi
cal Cyclone Flights
21-22 Feb
Science Priority – Evolution and Structure of ARs
Targets: 2 major landfalling AR events
along West Coast Tropical Moisture Export
(TMEs) events from Hawaii Poleward developing AR
between Hawaii and Alaska Occluded front in Gulf of AK
and midlatitude offshore AR between Hawaii and CA
Science Highlights
7-Day Observed Precipitation8 - 14 Feb 2014
Science Priority – Evolution and Structure of ARs
Targets: 2 major landfalling AR events
along West Coast Tropical Moisture Export
(TMEs) events from Hawaii Poleward developing AR
between Hawaii and Alaska Occluded front in Gulf of AK
and midlatitude offshore AR between Hawaii and CA
Forecast Improvements? – CrIS and ATMSItem 1: AR landfalling forecast errors are large (500 km at 5 days, 200 km at 1 day from Wick et al. 2013)
➤ Preliminary analysis suggests retrievals from CrIS and ATMS could improve landfalling forecasts
AR Developing on 21 Feb
GFS Integrated Vapor TransportInit 6Z 8 Feb, Valid 21Z 8 Feb
Flight Plan, 8 Feb 2014AR Mesoscale Frontal Wave
Item 2: Vertical structure of water vapor in ARs is crucial to getting integrated vapor transport correct
➤ Numerous discrepancies between model and dropsonde data were observed in vertical profiles of water vapor across ARs
Dropsondes
NOAA G-IV Payload Dropsondes – T, P, RH, wind speed and direction Tail Doppler Radar (TDR) – Reflectivity and wind field SFMR (Stepped Frequency Microwave Radiometer) – Surface winds and rain rate
G-IV in Anchorage, Feb 2014
12 research flights + 3 ferry flights (no science) for total of ~94 flight hr 190 sondes + 7 IR test sondes deployed with:
• 75% of project sondes released in first 7 research flights due to prime atmospheric river (AR) science opportunities from NorCA
• Focus on precipitation regions near associated with ARs near Hawaii/Alaska on last 5 research flights to take advantage of TDR capabilities
Flight Operations
Final approach into Travis after AR Box Module Flight11 Feb 2014
Final approach into Honolulu after Kona Low Flight19 Feb 2014
NOAA G-IV on the ramp at Anchorage before Flight into Gulf of AK22 Feb 2014
Flight Operations
7-Day Observed Precipitation8 - 14 Feb 2014
Research Flight 2 –Mesoscale Frontal Wave, 8 Feb 2014
Research Flight 12 – Midlatitude AR, 24 Feb 2014
Flight Operations
Final approach into Travis after AR Box Module Flight11 Feb 2014
Final approach into Honolulu after Kona Low Flight19 Feb 2014
NOAA G-IV on the ramp at Anchorage before Flight into Gulf of AK22 Feb 2014
Base of Operations: Travis AFB (Primary): 7 research flights Honolulu: 3 research flights (including science ferry to ANC) Anchorage: 2 research flights (including science ferry to TAFB)
Flight Planning: AR box modules IVT stacked flight modules Mesoscale frontal wave transects TDR modules AR transects
Flight Operations
Research Flight 4 – IVT 2-Layer Stacked Module
12 Feb 2014
2 stacked flights in coastal FIR were conducted with
flight levels above and below the icing layer to
evaluate TDR performance
Flight OperationsStaffing: PI – Chris Fairall Mission Scientists – Ralph (7 flights) and Spackman (5 flights) Onboard Scientists – White (3 flights) and Intrieri (1 flight) Guest Scientists – David Reynolds (NWS Monterey), Jay Jasperse
(SCWA), Gary Barnes (U of HI), U of HI graduate students Lead Forecaster – Cordeira
Research Flight SummaryRF01 – RF12
7 – 24 Feb 2014
Project Date – Flight
Base Mission Scientist
AR characteristics Flight Hours & Drops
Type of mission Notes
5/6 Feb – No fly TAFB Ralph Down Day for G-IV crew
7 Feb – RF01 TAFB Ralph Well-defined AR with IWV > 3 cm and IVT > 600 units
6.1 h, 23 drops 3 box moduleUsed 23 sondes; all good
3 boxes, each one about 1 hour to execute; Janet Intrieri onboard with Ralph
8 Feb – RF02 TAFB Ralph Well-defined AR with IWV > 3.5 cm and IVT > 700 units
8.1 h, 29 drops Mesoscale frontal waveUsed 29 sondes
Mesoscale frontal wave;Dave Reynolds and Jay Jasperse onboard with Ralph
9 Feb – No fly TAFB Ralph Moderate AR makes landfall on central CA coast
Cancelled Mission cancelled – Down day Near-shore track planned with military warning areas; Precip predicted to be onshore early; G-IV repair needed in Vegas
10 Feb TAFB Ralph None Maintenance G-IV in Vegas under repair; return to TAFB
11 Feb – RF03 TAFB Spackman Strong AR Offshore NorCal
6.1 h, 36 drops 3 AR boxes Box 2 is 50 nm larger north-south than IOP-1 due to uncertainty in AR axis position
12 Feb – RF04 TAFB Spackman AR Landfall NorCal 4.2 h, 15 drops IVT Stacked Flight (2 levels) Allen White onboard as Met support and familiarization
13 Feb – RF05 TAFB White Moderate AR off OR 5.9 h, 24 drops Far offshore IVT Cross Section
14 Feb – RF06 TAFB White Moderate AR off OR 4.1 h, 4 drops IVT Stacked Flight (3 levels) TDR survey at cruise and immediately above/below icing layer
15 Feb – RF07 TAFB Ralph Moderate AR near OR 7.0 h, 14 drops
17 Feb – To HNL TAFB Spackman No science 6.0 h Ferry Flight
Research Flight Summary
Project Date – Flight
Base Mission Scientist
AR characteristics Flight Hours & Drops
Type of mission Notes
18 Feb – RF08 HNL Spackman AR development 7.0 h, 14 drops IWV Remnants of Kona Low Gary Barnes and Vanessa Almanza (PhD student) onboard with Spackman
19 Feb – RF09 HNL Spackman AR development 6.7 h, 13 drops AR Source Region 3 UH graduate students flying; Chief Scientist (Spackman) on ground
20 Feb – No fly HNL Spackman Down Day
21 Feb – RF10 to ANC
HNL Spackman AR forming and elongating NNE from HI toward AK
7.9 h, 14 drops Multiple transects across high IWV region
Chief Scientist (Spackman) on ground
22 Feb – RF11 ANC Spackman Midlatitude AR in Gulf of Alaska
6.8 h, 1 drop TDR Survey along occluded front of extratropical cyclone
Painted precip with TDR for ~4 hr; Chief Scientist (Spackman) on ground
24 Feb – RF12 to TAFB
ANC Spackman Moderate AR near OR ~7.5 h, 3 drops TDR Survey along Midlatitude AR Chief Scientist (Spackman) on ground
25 Feb – To FL TAFB NA No science ~5 h Ferry Flight
Research Flight Summary
400 km
Enhanced vapor flux in Atmos. river
coldair
Warm,HumidAR core
Dropsonde leg: 1000 kmStart: FL410
FL150; T < -12C
End: FL060
Adapted from F. M. Ralph (Scripps)
ExecutionPlan
RF06 – IVT Module, 3-Level Stacked FlightTAFB, 4.1 h, 4 drops, 14 Feb 2014
RF06 – IVT Module, 3-Level Stacked FlightTAFB, 4.1 h, 4 drops, 14 Feb 2014
1915-1954 Z: FL410Reflectivity
RF06 – IVT Module, 3-Level Stacked FlightTAFB, 4.1 h, 4 drops, 14 Feb 2014
1915-1954 Z: FL410North-south vertical cross-section of a east-west-wind-component analysis approximately along the flight track
RF06 – IVT Module, 3-Level Stacked FlightTAFB, 4.1 h, 4 drops, 14 Feb 2014
2058-2117 Z: ~FL200Higher-resolution vertical cross section of reflectivity
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
F+24 h valid for Friday valid 00Z 22 Feb 2014
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
Way point determinations: NCEP – GFS Init 0600 UTC 21 Feb 2014F+18 h valid for Friday valid 00Z 22 Feb 2014
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
Way point determinations: NCEP – GFS Init 0600 UTC 21 Feb 2014F+18 h valid for Friday valid 00Z 22 Feb 2014
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
21 Feb 18 UTC
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
22 Feb 00 UTC
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
22 Feb 06 UTC
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
22 Feb 12 UTC
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
22 Feb 18 UTC
RF10 – Poleward Developing ARScience Ferry from HNL to ANC, 7.9 h, 14 drops, 21 Feb 2014
23 Feb 00 UTC