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| VIRGINIA COAST RESERVE LONG-TERM ECOLOGICAL RESEARCH |
Site PHCK, Month DEC, Year 1999 |
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| Day of Month | Precip (mm) | Max Temp. oC | Min Temp. oC | Mean Temp. oC | Wind Speed (m/s) | Wind Dir (deg.) | Vapor Press. (mb) | Solar Rad. KJ/m2 | PAR uE/m2 |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.00 | 2 | -2 | 0.4 | 2.98 | 316 | 3.41 | 10243 | 15892 |
| 2 | 0.00 | 9 | -2 | 2.9 | 0.93 | 261 | 4.57 | 10014 | 15439 |
| 3 | 0.00 | 13 | -0 | 6.3 | 0.22 | 221 | 6.65 | 7442 | 11001 |
| 4 | 0.00 | 20 | 5 | 12.9 | 1.42 | 226 | 8.45 | 8616 | 13456 |
| 5 | 0.00 | 20 | 5 | 12.3 | 0.97 | 154 | 11.24 | 9668 | 15024 |
| 6 | 10.41 | 16 | 10 | 13.9 | 0.75 | 297 | 15.45 | 2545 | 4391 |
| 7 | 0.00 | 10 | 2 | 7.4 | 3.13 | 270 | 7.97 | 9683 | 15110 |
| 8 | 0.00 | 12 | -2 | 4.0 | 0.09 | 196 | 6.98 | 8622 | 13609 |
| 9 | 0.00 | 15 | -0 | 5.9 | 0.02 | 102 | 8.18 | 8323 | 12728 |
| 10 | 4.57 | 17 | 6 | 11.8 | 1.06 | 10 | 13.15 | 5031 | 8401 |
| 11 | 0.00 | 13 | -0 | 6.4 | 2.50 | 337 | 6.05 | 9841 | 15127 |
| 12 | 0.00 | 13 | -2 | 4.8 | 0.13 | 68 | 6.36 | 8296 | 13087 |
| 13 | 0.00 | 17 | 7 | 12.4 | 0.03 | 40 | 13.27 | 3834 | 6510 |
| 14 | 24.38 | 21 | 10 | 14.1 | 1.46 | 352 | 15.33 | 6025 | 9424 |
| 15 | 0.00 | 11 | 8 | 9.4 | 0.28 | 355 | 10.92 | 4674 | 7111 |
| 16 | 0.00 | 12 | 6 | 9.6 | 1.40 | 50 | 8.53 | 8546 | 12772 |
| 17 | 0.00 | 11 | -2 | 5.4 | 0.46 | 105 | 5.94 | 9276 | 14396 |
| 18 | 0.00 | 14 | 1 | 7.7 | 0.16 | 143 | 7.86 | 6823 | 10814 |
| 19 | 0.00 | 12 | 8 | 10.4 | 2.98 | 18 | 11.46 | 3698 | 5801 |
| 20 | 2.03 | 16 | 10 | 13.0 | 1.64 | 8 | 14.83 | 3174 | 5775 |
| 21 | 1.02 | 12 | 4 | 9.2 | 0.80 | 2 | 11.08 | 2251 | 3888 |
| 22 | 1.27 | 5 | -2 | 2.2 | 1.22 | 341 | 6.17 | 5735 | 8917 |
| 23 | 0.00 | 7 | -5 | 1.0 | 0.53 | 263 | 5.52 | 8063 | 12614 |
| 24 | 0.00 | 5 | -2 | -0.5 | 0.83 | 352 | 4.02 | 4117 | 6162 |
| 25 | 0.00 | 0 | -7 | -3.3 | 1.28 | 353 | 2.99 | 7444 | 11423 |
| 26 | 0.00 | 8 | -7 | 0.7 | 2.31 | 340 | 4.34 | 9039 | 14184 |
| 27 | 0.00 | 6 | -4 | 0.9 | 0.13 | 7 | 5.16 | 9466 | 15120 |
| 28 | 0.00 | 2 | -3 | 0.0 | 0.14 | 353 | 4.85 | 4716 | 7566 |
| 29 | 0.00 | 5 | -3 | 1.9 | 2.18 | 349 | 4.47 | 9557 | 15516 |
| 30 | 0.00 | 15 | 1 | 8.4 | 2.56 | 316 | 6.76 | 9353 | 15178 |
| 31 | 0.00 | 13 | 2 | 8.3 | 0.73 | 166 | 8.05 | 8703 | 13850 |
| Mon. Tot. Precip. 43.7 mm | Mean wind vel. 1.140 m/s |
| Mon. Mean Temp. 6.4 deg. C | Wind dir 339 deg |
| Mean Max. Temp. 11.4 deg. C | Mean Min. Temp. 1.3 deg. C |
| Extreme Max. Temp 20.9 deg. C | Mean vapor press 8.06 mb |
| Extreme Min. Temp -7.0 deg. C | Total Solar Rad 222819 KJ/sq. m |
| Total photosyn. 350286 uEin/sq.m |
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| Daily Total Precipitation (mm) |
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| Hourly Mean Temperatures (deg. C) |
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| Hourly Max Min and Mean Temperatures (deg. C) |
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| Wind Speed (m/s) |
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| Frequency of Wind Direction |
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| Wind Vectors (circle=1.5 m/s) |
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| Relative Humidity (percent) |
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| Photosynthetically Active Radiation (micro-einsteins per m squared) |
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| Hourly Photosynthetically Active Radiation (micro-einsteins per m squared) |
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| Solar Radiation (KiloJoules per Meter Squared) |
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| Hourly Solar Radiation (KiloJoules per Meter Squared) |
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| Hours of Station Operation |
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| Data Logger Battery Voltage and Internal Logger Temperature |