1 / 10

EPIC 2001: 10N, 95W TAO Buoy, Brown, New Horizon

EPIC 2001: 10N, 95W TAO Buoy, Brown, New Horizon. Cruise- avg C-band radar rain rate. 146 km. O(10) differences over 150 km. Study of upper ocean budgets of heat and salt Weakly stratified pycnocline Measurements focused ~20 m and below

morela
Télécharger la présentation

EPIC 2001: 10N, 95W TAO Buoy, Brown, New Horizon

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. EPIC 2001: 10N, 95WTAO Buoy, Brown, New Horizon Cruise-avg C-band radar rain rate 146 km O(10) differences over 150 km • Study of upper ocean budgets of heat and salt • Weakly stratified pycnocline • Measurements focused ~20 m and below • Cruise averaged rain rate from (P-E) and evaporation rate agreed with ship mounted rain gauges

  2. EPIC Rain Comparisons: Rainfall rate, rr(mm h-1), and cumulative rain, CR (m) Optical Rain Gauge Brown Optical Rain Gauge New Horizon C-Band Radar – 10 km avg Brown • Cumulative rainfall from ship a factor of 2 larger than rain radar averaged over 10 km • Precipitation rates from rain radar average over 100 km radius was 1/3 of ship averages • Rain rate inferred from freshwater budget • Agreed with ship measurements • Differed from rain radar by factor of 2 (10 km avg) or 3 (100 km avg)

  3. Sea Snake, SeaSoar, and MMP(profiler) Time Series • RESIDUAL PATCHES • Frequency of occurrence of large SSS excursions from sea snake much greater than SeaSoar or MMP • TEMPORAL VARIABILITY • Cruise dS/dt from sea snake significantly greater than that from shallowest SeaSoar/MMP measurement Sea Snake Sea Soar MMP

  4. Ship-based Measurement Consideration • Characterize SSS variability: near-surface to 100 m • Surface forcing functions • Characterize spatial and temporal variability • Underway salinity and temperature profiling: 4-6 kts • Skin SST via IR radiometer • Pumped sea snake: 10 cm • Towed SSP (Surface Salinity Profiler) 10 cm to 1 or 2 m • Through hull TSG – Thompson (Brown): 2 m, 3 m, 5 m • Scanfish/towed CTD/MVP: 10-150+ m

  5. Ship-base measurements (continued) • Surface fluxes • Direct covariance • Downwelling/upwelling SW/LW radiation • Precipitation • Spatial scales: Rain radar • Point rain accumulation: disdrometers, capacitance • Surface wave field: Ship-based radar • New Doppler radar being developed at APL-UW • WAMOS • Mapping thermal patches: ship & balloon IR cameras

  6. Interagency Interest: ONR • Physical Oceanography – Scott Harper • Near-surface salinity/DYNAMO • Waveglider innovations • Air-sea fluxes • Near-surface T/S profiles • FLIP • Air-Sea Fluxes • Detailed near-surface T/S: 0-10+ m • Dissipation? • Platform for NSF proposals?

  7. FLIP: Floating Instrument Platform • San Diego to 10N 125W: 1440 nmi (10 day transit at 6 knts) • 35 day duration without underway replenishment • Replenish (food and fuel) from research vessel • Tug considerations

  8. SPURS2: Autonomous Platform Considerations • Persistence and collectively large footprint • Capture seasonality of precipitation cycle • Measure impact of episodic and patchy rain events • Processes controlling evolution of near-surface salinity • Waveglidernear surface measurements • Air-sea fluxes: spatial variability (validate w/ mooring) • Pumped stinger sampling: SSS/SST 0-1m • Passive Acoustics: Rain rate and wind speed • Platforms: Argo, Seaglider, MLF • Central mooring

  9. Autonomous Platforms: Lagrangian Component • Tandem platforms • Wave- or seaglider following Mixed-layer float • Or follow patch of fresh water • EPIC hypothesis: Heavy rain with anticyclonic eddy • Follow eddy/low SSS patch identified by mooring • Seaglider – turbulence • Waveglider – SSS profile and air-sea fluxes EPIC (3-week average) SSH TRMM

More Related