Hawaii Ocean Time-series (HOT)
in the School of Ocean and Earth Science and Technology at the University of Hawai'i at Manoa
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Wind speed and direction, atmospheric pressure, wet- and dry-bulb air temperature, sea surface temperature (SST), cloud cover and weather code were recorded at four-hour intervals while at Station ALOHA by the science personnel. Continuous wind velocity measurements recorded at 5-min intervals from the anemometers on the R/V Kilo Moana (21 m height), and the R/V Ka'imikai-O-Kanaloa (18 m height) were also available.
Also available were hourly atmospheric pressure, air temperature, SST, wind velocities and relative humidity measurements from the WHOTS buoy. The anemometers in the buoy were 3.4 m above the sea surface. The time-series of shipboard observations obtained by the science group was plotted, and obvious outliers were identified and flagged. The SST-dry air temperature and wet-dry air temperature plots also helped to identify outliers. Outliers in the shipboard pressure, air temperature, SST, and wind observations were detected by comparison with the WHOTS buoy data.
In addition to wind speed and direction (RM Young port and starboard side anemometers), instruments on the R/V Kilo Moana provided measurements of air temperature (RM Young Resistive Temperature Device), relative humidity (Rotronic Instrument Corp. humidity probe), barometric pressure (Vaisala digital barometer), incoming shortwave (Eppley Precision Spectral Pyranometer) and longwave radiation (Eppley Precision Infrared Radiometer), and precipitation (OSI Optical Rain Gauge (ORG) and RM Young), these data were compared against the measurements taken by the WHOTS buoy.
The meteorological data collected at 4-hour intervals by HOT program scientists include atmospheric pressure, sea-surface temperature and wet and dry bulb air temperature. These data are presented in Figure 76, Figure 77 and Figure 78. Parameters show evidence of annual cycles, although the daily and weekly ranges are nearly as high as the annual range for some variables. Wind speed and direction are also collected on HOT cruises. These data are presented in the Figures below.
Hourly atmospheric pressure, air temperature, sea surface temperature, and relative humidity measurements were also available from the WHOTS buoy. These data are also plotted in Figure 76, Figure 77 and Figure 78.
The thermosalinograph temperatures obtained at Station ALOHA during cruises are also plotted together with the sea-surface meteorological observations in Figure 76 (lower panel) and show good agreement with these measurements.
The wind vectors from the WHOTS buoy are plotted together with the ship wind observations in the Figures below.