dep_sonde: Profile data collected by Maine Department of Environmental...

In ccb60/tdggraph: Simple ggplot2 graphics for depth profiles in limnology and oceanography

Description

A dataset containing vertical profile data collected by automated water quality sonde by Maine's Department of Environmental Protection staff. Data has been filtered down to only include data from one site and one year. Currently, the data is from Site "FR09", just outside the mouth of the Fore River, from 2018. The site and year may change between versions of this package.

Usage

data(dep_sonde)

Format

A data frame with 108 rows and 16 variables:

site

Site Code. A unique character string for different locations. Retained her for documentation purposes, but will include only one value.

sample_date

Date of sample collection (as and R Date).

month

Month of sample collection, as a factor. Uses three letter codes.

time

Time of sample collection, as an R hms object.

depth

Depth of readings, in meters.

temp

Water temperature (C).

salinity

Salinity in "Practical Salinity Units" (roughly PPT).

ph

pH value, measured with a electrochemical pH meter, thus on the "NBS" scale. This value can differ from the "Total" pH scale often used in ocean acidification research. See, for example, Pimenta and Greer. 2018. Guidelines for measuring changes in pH and associated carbonate chemistry in coastal environments of the Eastern United States. Atlantic Ecology Division, National Health and Environmental Effects Research Laboratory, US Environmental Protection Agency, Narragansett, RI. EPA/600/R-17/483 available at http://necan.org/sites/default/files/EPA600_R17_483coastalAcidificationMonitoringGuidelinesFinal%20041318%20%282%29_0.pdf.

pctsat

Oxygen percent saturation.

do

Dissolved oxygen (mg/l).

chl_a_sonde

Chlorophyll a, (mg/l), measured by a fluorometer. All data is marked with data quality flags as "estimate". For high accuracy work, in situ flourometric analysis of chlorophyll should be calibrated after data collection against laboratory chlorophyll values. These data reflect only the uncorrected field estimates.

turbidity

Turbidity measurements or detection limits (NTU).

turbidity_cens

True / False. Was this turbidity measurement below detection? If so, the value in turbidity is the detection limit.

Details

Data includes temperature, salinity, dissolved oxygen, pH, chlorophyll A and turbidity. Data was collected by lowering automated water quality sensor apparatus from a boat. As the device is lowered, it periodically collects data on depth and water quality parameters. Lack of discrete samples to calibrate optical estimates of chlorophyll A mean the chlorophyll data should be treated as provisional.

Source

Maine Department of Environmental Protection, via Casco Bay Estuary Partnership's (CBEP) 2020 State of Casco Bay Report. Original data received by CBEP from Angie Brewer, Marine Scientist for Maine DEP in response to a request for data to be used in the 2020 State of Casco Bay Report. CBEP staff reviewed, simplified and reorganized the data while preparing the report. Additional information on the report and associated data and data analysis archives are available on the CBEP web site at https://cascobayestuary.org.

ccb60/tdggraph documentation built on Dec. 19, 2021, 1:58 p.m.