Ceptometer derived light interception data
fd_ceptometer()
A data.frame or tibble. See "Details" for column descriptions.
Call fd_metadata for field metadata.
data on light interception, as faPAR or the fraction of absorbed photosynthetically available radiation, based on the difference between above and below canopy PAR as measured by a Decagon LP-80 handheld ceptometer. Units of a_par, above canopy PAR, and b_par, below canopy PAR, are in units of micromoles per square meter per second while fapar and lai_cept, leaf area index derived from light data, are ratio-based, unitless data.
Data were collected by Jeff W. Atkins and Brandon Alveshare using a Decagon LP-80 Handheld Ceptometer
fd_ceptometer()#> # A tibble: 48 x 9 #> subplot_id replicate plot subplot timestamp a_par b_par fapar #> <chr> <chr> <int> <chr> <dttm> <dbl> <dbl> <dbl> #> 1 D01W D 1 W 2018-07-25 10:45:00 1276. 61.8 0.952 #> 2 D03W D 3 W 2018-07-25 10:56:00 1305. 98.3 0.925 #> 3 D04W D 4 W 2018-07-25 11:07:00 1305. 345. 0.735 #> 4 D02W D 2 W 2018-07-25 11:17:00 1367. 58 0.958 #> 5 C04W C 4 W 2018-07-25 11:24:00 1439. 40.6 0.972 #> 6 C03W C 3 W 2018-07-25 11:34:00 1383. 43.5 0.969 #> 7 C02W C 2 W 2018-07-25 11:45:00 1464. 49.5 0.966 #> 8 C01W C 1 W 2018-07-25 11:52:00 1475. 116 0.921 #> 9 B04W B 4 W 2018-07-25 13:25:00 1708. 61.7 0.964 #> 10 B03E B 3 E 2018-07-25 13:36:00 1768. 110. 0.938 #> # ... with 38 more rows, and 1 more variable: lai_cept <dbl>