IMPROVE Data
Advisories
This is an IMPROVE data user community supported page meant to document
interesting findings from the IMPROVE database including data anomalies,
potential problems, and new uses for the IMPROVE data. These advisories
are not meant to be comprehensive or complete. In addition, unless
explicitly stated the data advisories are not necessarily endorsed by the
IMPROVE steering committee, National Park Service, CIRA or others.
Contact Bret Schichtel to
submit a data advisory.
|
Bias between
masked and unmasked elemental measurements |
Submitted by:
W.H. White |
On: 07/2008 |
Doc #: da0019 |
|
Sites: Entire network |
Time Period:
evident since 2002 |
Module/Species:
A/ S |
|
Positive
interference in PIXE titanium determinations |
Submitted by:
W.H. White |
On: 03/2008 |
Doc #: da0018 |
|
Sites: Entire network |
Time Period:
Before 12/1/2001 |
Module/Species:
A/ Ti |
|
Changes in
sodium data quality |
Submitted by:
W.H. White |
On: 11/2007 |
Doc #: da0017 |
|
Sites: Entire network |
Time Period:
12/1/2001 – Present |
Module/Species:
A/ Na |
|
Shift in
EC/OC split with 1 January 2005 TOR hardware upgrade |
Submitted by:
W.H. White |
On: 10/2007 |
Doc #: da0016 |
|
Sites: Entire network |
Time Period:
1/1/2005 – Present |
Module/Species:
C/ EC, OC; OC1, OC2, OC3, OC4, OP, EC1, EC2, EC3 |
|
Change
in definition of flowrate native flags |
Submitted by:
C. McDade |
On: 9/2007 |
Doc #: da0015 |
|
Sites: Entire network |
Time Period:
1/1/2005 – Present |
Module/Species:
A, B, C/ All species |
|
Shifts in
Mo-anode XRF element calibration factors |
Submitted by:
R. Flocchini |
On: 9/2007 |
Doc #: da0014 |
|
Sites: Entire network |
Time Period:
9/2005 |
Module/Species:
A/ Ni, As, Se, Br, Rb, Pb |
|
Introduction of a second copper-anode XRF system |
Submitted by:
W.H. White |
On: 2/2007 |
Doc #: da0013 |
|
Sites: Entire network |
Time Period:
2005 – Present |
Module/Species:
A/ Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe |
|
Varying bias of
XRF sulfur relative to IC sulfate |
Submitted by:
W.H. White |
On: 1/2007 |
Doc #: da0012 |
|
Sites: Entire network |
Time Period:
2003 – 2004; maybe to earlier years |
Module/Species:
A/ S |
|
S interference
in XRF determination of Si |
Submitted by:
W.H. White |
On: 12/2006 |
Doc #: da0011 |
|
Sites: Entire network |
Time Period:
2001 - Present |
Module/Species:
A/ S,Si |
|
Elemental
concentrations of Al above the MDL can go undetected |
Submitted by:
W.H. White |
On: 11/2006 |
Doc #: da0010 |
|
Sites: Entire network |
Time Period:
entire record |
Module/Species:
A/ Al |
|
Changed
reporting of XRF sulfur |
Submitted by:
W.H. White |
On: 10/2006 |
Doc #: da0009 |
|
Sites: Entire network |
Time Period:
1/1/05 - |
Module/Species:
A/ S |
|
B-module data from Virgin Islands
|
Submitted by:
W.H. White |
On: 9/2006 |
Doc #:
da0008 |
|
Sites: VIIS |
Time Period:
6/2001 - 5/2003 |
Module/Species:
B/ CHL, NO3, SO4 |
|
1-in-6-day Cu contamination
from foreign samplers |
Submitted by:
W.H. White |
On: 9/2006 |
Doc #: da0007 |
|
Sites: ATLA,
BADL, BRMA, PMRF, ROMA, others |
Time Period:
2002 - |
Module/Species:
A/ Cu |
|
High concentrations
attributable to documented wildfire |
Submitted by:
W.H. White |
On: 9/2006 |
Doc #: da0006 |
|
Sites: PORE |
Time Period:
10/12/04 |
Module/Species:
A/ K;
C/ OC EC |
|
Sporadic contamination by Zn |
Submitted by:
W.H. White |
On: 9/2006 |
Doc #: da0005 |
|
Sites:
Entire network |
Time Period:
2004 known to be affected; earlier years may have been affected |
Module/Species:
A/ Zn |
|
Significant Number of
Under Reported Sulfate Ion Concentrations Prior to 3/15/1989 |
Submitted by:
B.A. Schichtel |
On: 9/2006 |
Doc #: da0004 |
|
Sites:
Sites in the Eastern United States |
Time Period:
1992-1994 |
Module/Species:
B/ SO4 |
|
Significant Loss of Ion
Concentrations in 1998 Due to Clogging of Module B Nylon Filters |
Submitted by:
B.A. Schichtel |
On: 9/2006 |
Doc #: da0003 |
|
Sites:
Entire network |
Time Period:
6/1996 |
Module/Species:
B/ all |
|
Diminished wintertime nitrate concentrations in late 1990s |
Submitted by:
C. McDade |
On: 3/2007 |
Doc #:
da0002 |
|
Sites:
Entire network |
Time Period:
1998 |
Module/Species:|
B/ SO4 |
|
Underestimation of
Sulfur Concentrations During High Loadings and Humidity Conditions in the
Eastern US |
Submitted by:
B.A. Schichtel |
On: 11/2003 |
Doc #:
da0001 |
|
Sites:
Entire network |
Time Period:
1988 - 3/15/1989 |
Module/Species:
A/ S |
