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| VIRGINIA COAST RESERVE LONG-TERM ECOLOGICAL RESEARCH |
Site PHCK, Month DEC, Year 1991 |
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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 | 19 | 12 | 15.8 | 0.75 | 196 | 16.72 | 2670 | 5792 |
| 2 | 0.00 | 21 | 12 | 15.0 | 2.10 | 84 | 16.99 | 960 | 2884 |
| 3 | 0.00 | 21 | 14 | 17.4 | 2.17 | 203 | 18.83 | 3815 | 7946 |
| 4 | 0.00 | 16 | 0 | 6.2 | 4.86 | 292 | 5.42 | 7835 | 13448 |
| 5 | 0.00 | 3 | -4 | -0.3 | 2.51 | 309 | 3.23 | 9229 | 16072 |
| 6 | 0.00 | 13 | -1 | 5.0 | 2.93 | 234 | 5.20 | 9292 | 15902 |
| 7 | 0.00 | 0 | -2 | -0.6 | 0.33 | 216 | 5.78 | . | . |
| 9 | 0.00 | 20 | 11 | 15.7 | 2.35 | 215 | 11.95 | 7369 | 13787 |
| 10 | 0.00 | 14 | -0 | 7.4 | 2.30 | 346 | 8.90 | 8117 | 14912 |
| 11 | 0.00 | 13 | -2 | 4.2 | 0.31 | 172 | 7.53 | 8993 | 16115 |
| 12 | 0.00 | 14 | 0 | 7.0 | 0.19 | 133 | 9.76 | 4947 | 9419 |
| 13 | 18.80 | 21 | 10 | 16.0 | 2.94 | 207 | 14.85 | 5418 | 10532 |
| 14 | 0.00 | 19 | 9 | 17.0 | 4.65 | 234 | 15.06 | 1829 | 3768 |
| 15 | 0.00 | 9 | -0 | 5.4 | 3.75 | 275 | 3.04 | 9366 | 16523 |
| 16 | 0.00 | 6 | -6 | 0.3 | 2.78 | 302 | 3.16 | 8954 | 15852 |
| 17 | 0.00 | 12 | -6 | 4.5 | 2.70 | 212 | 4.27 | 8730 | 15567 |
| 18 | 0.00 | 10 | -2 | 4.4 | 3.03 | 321 | 4.30 | 8750 | 15636 |
| 19 | 0.00 | -0 | -5 | -2.4 | 3.98 | 342 | 2.54 | 9012 | 15982 |
| 20 | 0.00 | 6 | -7 | -0.4 | 1.43 | 317 | 3.04 | 8933 | 16081 |
| 21 | 0.00 | 11 | 1 | 6.0 | 3.31 | 248 | 4.72 | 3851 | 7023 |
| 22 | 0.00 | 10 | -3 | 3.7 | 1.48 | 314 | 4.82 | 8983 | 16326 |
| 23 | 0.00 | 15 | -4 | 6.9 | 1.28 | 201 | 9.25 | 4029 | 8284 |
| 24 | 0.00 | 14 | -4 | 5.5 | 3.05 | 338 | 7.14 | 5874 | 10708 |
| 25 | 0.00 | 8 | -5 | -0.1 | 0.97 | 316 | 4.67 | 8804 | 16063 |
| 26 | 0.00 | 8 | -6 | 0.5 | 0.34 | 56 | 5.50 | 8657 | 15748 |
| 27 | 0.00 | 7 | -3 | 3.7 | 1.01 | 348 | 6.23 | 2189 | 4332 |
| 28 | 0.00 | 10 | -2 | 5.2 | 2.05 | 43 | 8.26 | 5760 | 11427 |
| 29 | 0.00 | 16 | 8 | 10.5 | 1.52 | 265 | 12.88 | 2625 | 5875 |
| 30 | 0.00 | 9 | 3 | 6.4 | 3.12 | 327 | 7.89 | 4007 | 8054 |
| 31 | 0.00 | 4 | 0 | 2.3 | 2.48 | 5 | 5.53 | 2578 | 4927 |
| Mon. Tot. Precip. 18.8 mm | Mean wind vel. 2.222 m/s |
| Mon. Mean Temp. 6.3 deg. C | Wind dir 286 deg |
| Mean Max. Temp. 11.6 deg. C | Mean Min. Temp. 0.6 deg. C |
| Extreme Max. Temp 21.3 deg. C | Mean vapor press 7.92 mb |
| Extreme Min. Temp -7.1 deg. C | Total Solar Rad 181573 KJ/sq. m |
| Total photosyn. 334981 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 |