| Universal calibration constants for flow rate calculation |
Submitted by: C. Wallis |
On: 09/2019 |
Doc #: da0044 |
| Sites: All, following installation of Version 4 controllers |
Time Period: 2018-present |
Module/Species: All |
| Change in analytical protocol for XRF analysis |
Submitted by: K. Trzepla |
On: 06/2019 |
Doc #: da0043 |
| Sites: All |
Time Period: 10/2018-present |
Module/Species: A/All elements |
| Method change for calibrating flow rate transfer standards |
Submitted by: C. Wallis |
On: 05/2019 |
Doc #: da0042 |
| Sites: All |
Time Period: 1/2015-present |
Module/Species: All |
| Changes to HIPS System |
Submitted by: K.Trzepla & J. Giacomo |
On: 04/2019 |
Doc #: da0041 |
| Sites: All |
Time Period: 1/2017-present |
Module/Species: A/Fabs |
| Updated data for Carbon |
Submitted by: B Schichtel |
On: 04/2019 |
Doc #: da0040 |
| Sites: All |
Time Period: 1/2016-2/2017 |
Module/Species: C/ EC, OC, TC, Carbon fractions |
| Correction of chloride concentrations for filter blank levels |
Submitted by: X. Zhang |
On: 3/2019 |
Doc #: da0039 |
| Sites: All |
Time Period: 2007-2011 |
Module/Species: B/ Cl- |
| Calibration bias in reported vanadium concentrations |
Submitted by: K. Trzepla |
On: 02/2018 |
Doc #: da0038 |
| Sites: All |
Time Period: 1/2011-10/2017 |
Module/Species: A/ V |
| Over-reporting of sodium in salt-rich samples |
Submitted by: W.H. White |
On: 06/2017 |
Doc #: da0037 |
| Sites: All |
Time Period: Before 1/1/2011 |
Module/Species: A/ Na |
| Negative chloride concentrations at salt-poor sites |
Submitted by: W.H. White |
On: 03/2017 |
Doc #: da0036 |
| Sites: All |
Time Period: 2000-2003 |
Module/Species: B/ Cl – |
| Increased variation of humidity in the weighing laboratory |
Submitted by: W.H. White |
On: 09/2016 |
Doc #: da0035 |
| Sites: All |
Time Period: 2011 and later |
Module/Species: A/ MF D/ MT |
| Bias between masked and unmasked light absorption measurements |
Submitted by: W.H. White |
On: 10/2015 |
Doc #: da0034 |
| Sites: All |
Time Period: Before 2008 |
Module/Species: A/ Fabs |
| Changed reporting of light absorption |
Submitted by: W.H. White |
On: 09/2015 |
Doc #: da0033 |
| Sites: All |
Time Period: All sample years |
Module/Species: A/ Fabs |
| Change to artifact correction method for OC carbon fractions |
Submitted by: A. M. Dillner |
On: 09/2015 |
Doc #: da0032 |
| Sites: All |
Time Period: 1/1/2005 – current |
Module/Species: C/OC |
| Changes in redelivery of 1/2005 through 5/2014 data |
Submitted by: Xiaoya Cheng |
On: 09/2015 |
Doc #: da0031 |
| Sites: All |
Time Period: 1/1/2005 – 5/31/2014 |
Module/Species: All |
| Temporary contamination of Columbia River A-module samples |
Submitted by: W. H. White et al., |
On: 06/2014 |
Doc #: da0030 |
| Sites: CORI |
Time Period: 11/5/2011 – 7/14/2012 |
Module/Species: A/ Zn, MF |
| Contamination associated with new sampler shed |
Submitted by: W. H. White et al., |
On: 06/2014 |
Doc #: da0029 |
| Sites: NOAB |
Time Period: 1/1/2008 – 8/16/2012 |
Module/Species: A/ Cr, Ni |
| Bias between masked and unmasked light absorption measurements |
Submitted by: W. H. White |
On: 03/2010 |
Doc #: da0028 |
| Sites: All |
Time Period: Before 2008 |
Module/Species: A/ fabs |
| Suspect light-absorption data from three months in 2000 |
Submitted by: W. H. White |
On: 03/2010 |
Doc #: da0027 |
| Sites: All |
Time Period: 9/1/2000 – 11/30/2000 |
Module/Species: A/ fabs |
| Marginal detection of heavy elements by PIXE analysis |
Submitted by: W. H. White |
On: 03/2010 |
Doc #: da0026 |
| Sites: All |
Time Period: Before 6/1/1992 |
Module/Species: A/ Pb, Sr, Se, Rb |
| Arcane flagging of early hydrogen and fine mass data |
Submitted by: W. H. White |
On: 03/2010 |
Doc #: da0025 |
| Sites: All |
Time Period: 9/1/1990 – 2/26/1992 |
Module/Species: A/ MF, H |
| Under-correction of chloride concentrations for filter blank levels – historical Advisory: Applies to downloads before 11/23/2009 |
Submitted by: W. H. White |
On: 08/2009 |
Doc #: da0024 |
| Sites: All |
Time Period: 2005 – 2008 |
Module/Species: B/ Cl |
| Inconstant bias in XRF sulfur – Advisory Update to da0012 |
Submitted by: W. H. White |
On: 05/2009 |
Doc #: da0023 |
| Sites: All |
Time Period: All |
Module/Species: A/ S |
| Data losses during episodes of heavy smoke |
Submitted by: W. H. White |
On: 01/2009 |
Doc #: da0022 |
| Sites: All |
Time Period: All |
Module/Species: A/ MF, elements, fabs |
| Mis-reporting of light-absorption on masked filters – Historical Advisory: Applies to downloads before 4/17/2009 |
Submitted by: W. H. White |
On: 09/2008
Modified on: 04/2009 |
Doc #: da0021 |
| Sites: BRID1, DENA1, HALE1, HANC1, HAVO1, MEVE1, MORA1, NOAB1, NOCA1, OLYM1, PETE1, SIME1, SNPA1, TRCR1, TUXE1, VIIS1, WEMI1, WHIT1, WHPA1, WHPE1, WHRI1, ZICA1 |
Time Period: 2005 – 2006 |
Module/Species: A/ fabs |
| Invalid data for collocated (POC = 2) samples – Historical Advisory: Applies to downloads before 4/17/2009 |
Submitted by: W. H. White |
On: 09/2008
Modified on: 04/2009
|
Doc #: da0020 |
| Sites: MEVE1, OLYM1, PMRF1, SAFO1, SAMA1, TRCR1 |
Time Period: January – July, 2005 |
Module/Species: A/ H, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe |
| 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 – Updated Advisory |
Submitted by: W. H. White |
On: 9/2006
Modified on: 05/2009 |
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 – Updated Advisory |
Submitted by: W. H. White |
On: 9/2006
Modified on: 05/2009 |
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 |
