Weather data from Macleish Field Stations

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Description

Weather data collected at the Macleish Field Station in Whately, MA during 2015.

Usage

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Format

For both, a data frame (tbl_df) with roughly 52,560 rows and 8 or 9 variables.

The following variables are values that are found in either the whately_2015 or orchard_2015 data tables.

All variables are averaged over the 10 minute inverval unless otherwise noted.

when

Timestamp for each measurment set in Eastern Standard Time.

temperature

average temperature, in Celsius

wind_speed

Wind speed, in meters per second

wind_dir

Wind direction, in degrees

rel_humidity

How much water there is in the air, in millimeters

pressure

Atmospheric pressure, in millibars

rainfall

Total rainfall, in millimeters

solar_radiation

Amount of radiation coming from the sun, in Watts/meters^2. Solar measurement for Whatley

par_density

Photosynthetically Active Radiation (sunlight between 400 and 700 nm), in average density of Watts/meters^2. One of two solar measurements for Orchard

par_total

Photosynthetically Active Radiation (sunlight between 400 and 700 nm), in average total over measurement period of Watts/meters^2. One of two solar measurements for Orchard

Details

The Macleish Field Station is a remote outpost owned by Smith College and used for field research. There are two weather stations on the premises. One is called WhatelyMet and the other is OrchardMet.

The WhatelyMet station is located at (42.448470, -72.680553) and the OrchardMet station is at (42.449653, -72.680315).

WhatelyMet is located at the end of Poplar Hill Road in Whately, Massachusetts, USA. The meteorological instruments of WhatelyMet (except the rain gauge) are mounted at the top of a tower 25.3 m tall, well above the surrounding forest canopy. The tower is located on a local ridge at an elevation 250.75m above sea level.

OrchardMet is located about 250 m north of the first tower in an open field next to an apple orchard. Full canopy trees (~20 m tall) are within 30 m of this station. This station has a standard instrument configuration with temperature, relative humidity, solar radiation, and barometric pressure measured between 1.5 and 2.0 m above the ground. Wind speed and direction are measured on a 10 m tall tower and precipitation is measured on the ground. Ground temperature is measured at 15 and 30 cm below the ground surface 2 m south of the tower. The tower is located 258.1 m above sea level. Data collection at OrchardMet began on June 27th, 2014.

The variables shown above are weather data collected at WhatelyMet and OrchardMet during 2015. Solar radiation is measured in two different ways: see SlrW_Avgor the PAR variables for Photosynthetic Active Radiation.

Note that a loose wire resulted in erroneous temperature reading at OrchardMet in late November, 2015.

Source

These data are recorded at http://www.smith.edu/ceeds/macleish_monitoring.php

Examples

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## Not run: 
#' # loose wire anomalies
if (require(dplyr) & require(ggplot2) & require(lubridate)) {
 orchard_2015 %>%
 filter(month(when) == 11) %>%
   ggplot(aes(x = when, y = temperature)) +
   geom_line() + geom_smooth()
}

## End(Not run)

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