2001chemical data for all AK Lakes

For field work and sampling protocols see "Sampling and Field Methods Protocol" on The Arctic LTER webpage (http://ecosystems.mbl.edu/ARC/) specific link found below. 

All measurements were taken with a DS5 Hydrolab Datasonde. Depth reading on sonde was calibrated in the field so that a depth of 0m was the water surface. For profiles, measurements were taken at surface (~0m), at ~0.5m depth, at ~1m of depth, then at 1m intervals until bottom. Measurements were recorded on a Surveyor 4a datalogger and also recorded in a field book.  Values recovered from the Surveyor 4a datalogger were used except where values were either missing or highly suspect, in which case values from the fieldbook were used and noted under the "Notes" column.

This file was created from a working file titled "2009AKLakes". History of the file is listed below:

Date User Changes/Corrections
4-Jul-2005 Dan White Created 2009AKLAKES file from 2008AKLAKES file
4-Jul-2005 Dan White Added first few Toolik Hydrolab cast upto 3Jul in physchem09 and Chl and PO4 data to Nutrients
24-Jul-2005 Dan White Added NH4 data upto 24Jul, and Chl-a data upto 20Jul
25-Jul-2005 Dan White Added Hydrolab casts up to present
27-Jul-2005 Dan White Added PO4 data upto 24Jul
30-Aug-2005 Dan White Added the remainder of the seasons Chl-a values and PO4 values to the Nutrients09 tab
31-Aug-2005 Dan White Added the remainder of the seasons hydrolab casts to the Physchem09 tab
1-Sep-2005 Dan White Added the remainder of the seasons NH4 values to the Nutrients09 tab
6-Oct-2005 Dan White Added in missing date (29 Jul09) hydrolab cast for E5 and E6 on Physchem09 page
6-Oct-2005 Dan White Added missing depth (6m) to hydrolab cast for Lake I8 on 5Aug09 from fieldbook
7-Oct-2005 Dan White Resorted Physchem09 page to put hydrolab casts in order by date
1-Nov-2005 Dan White Added Late-season Toolik hydrolab cast to Physcem09 tab supplied by Christie Haupert