#HEADER# PROJECT=ICEALOT PLATFORM=KNORR FILE_START_TIME=2008 03 19 23 40 FILE_STOP_TIME=2008 04 23 18 01 DATA_TYPE=TIMESERIES-1D VERSION=0 SUBMIT_DATE=05-NOV-2008 SOURCE=Quinn, Patricia K/NOAA-PMEL/Phone: 206-526-6892 /Address: 7600 Sand Pt. Wy. NE,Seattle,WA 98115 /email: patricia.k.quinn@noaa.gov #REMARKS# Data Source Description= Aerosol Chemistry Data, Cations - collected with 2 stage impactors during ICEALOT 2008 Time Description= irregular time interval Other= Below Detection Level Indicator = 0 Version 0= Initial version, no comments Aerosol Ion Chemistry Data Contact persons: Tim Bates, tim.bates@noaa.gov; Trish Quinn, patricia.k.quinn@noaa.gov Two-stage multi-jet cascade impactors (Berner et al., 1979) sampling air at <25% RH were used to determine the sub- and supermicrometer concentrations of Cl-, Br-, NO3-, SO4=, methanesulfonate (MSA-), oxalate (Ox-), Na+, NH4+, K+, Mg+2, and Ca+2. Sampling periods ranged from 2 to 23 hours. The RH of the sampled air stream was measured a few inches upstream from the impactor. The 50% aerodynamic cutoff diameters, D50,aero, were 1.1 and 10 um. Submicrometer refers to particles with Daero < 1.1 um at <25% RH and supermicrometer refers to particles with 1.1 um < Daero < 10 um at <25% RH. The impaction stage at the inlet of the impactor was coated with silicone grease to prevent the bounce of larger particles onto the downstream stages. Tedlar films were used as the collection substrate in the impaction stage and a Millipore Fluoropore filter (1.0-um pore size) was used for the backup filter. Films were cleaned in an ultrasonic bath in 10% H2O2 for 30 min, rinsed in distilled, deionized water, and dried in an NH3- and SO2-free glove box. Filters and films were wetted with 1 mL of spectral grade methanol. An additional 5 mLs of distilled deionized water were added to the solution and the substrates were extracted by sonicating for 30 min. The extracts were analyzed by ion chromatography [Quinn et al., 1998]. All handling of the substrates was done in the glove box. Blank levels were determined by loading an impactor with substrates but not drawing any air through it. Non-sea salt sulfate concentrations were calculated from Na+ concentrations and the ratio of sulfate to sodium in seawater. Concentrations are reported as ug/m3 at STP (25C and 1 atm). Values below the detection limit are denoted with a -8888, missing data are denoted with a -9999. Berner et al., Sci. Total Environ., 13, 245 - 261, 1979. Quinn et al., J. Geophys. Res., 105, 6785 - 6805, 2000. #TIME PARAMETERS# year month day hour minute second #PARAMETER# Duration minutes * 0 59 -9999 628 #PARAMETER# DayOfYear DecimalDay * 1 365.9999 -9999 627 #PARAMETER# LAT Deg GPS -90 90 -9999 500 #PARAMETER# LONGT Deg GPS -180 360 -9999 502 #PARAMETER# subNa ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1920 #PARAMETER# supNa ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1921 #PARAMETER# subNH4 ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1923 #PARAMETER# supNH4 ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1924 #PARAMETER# subK ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1926 #PARAMETER# supK ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1927 #PARAMETER# subMg ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1929 #PARAMETER# supMg ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1930 #PARAMETER# subCa ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1932 #PARAMETER# supCa ug/m3 2-stage impactor -- ion chromatographic analysis 0 50 -9999 1933 #DATA 2 HEADINGS# Y M D HR Min Sec Dur DayOfYear LAT LONGT subNa supNa subNH4 supNH4 subK supK subMg supMg subCa supCa Y M D HR Min Sec Min DecimalDay Deg Deg ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 ug/m3 2008 3 19 23 40 45 666.5 80.21806 41.10968 -73.16056 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 2008 3 20 12 48 32 520.0 80.71428 40.99812 -73.45270 0.092 0.651 0.351 0.000 0.016 0.023 0.010 0.010 0.016 0.000 2008 3 21 1 25 0 562.0 81.25417 40.98068 -73.33315 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 2008 3 21 13 29 0 311.0 81.66979 41.02867 -73.31842 0.151 0.207 0.533 0.000 0.028 0.000 0.031 0.031 0.077 0.000 2008 3 22 18 47 0 956.0 83.11458 42.39382 -65.44318 0.324 2.773 0.231 0.000 0.046 0.137 0.027 0.027 0.039 0.098 2008 3 23 12 40 0 530.0 83.71181 43.03574 -61.50759 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 2008 3 24 12 33 0 539.0 84.71007 44.03978 -54.82848 0.310 2.510 0.158 0.000 0.031 0.127 0.025 0.025 0.023 0.125 2008 3 24 22 59 0 609.0 85.16910 44.41953 -51.76214 0.644 3.471 0.312 0.000 0.100 0.165 0.058 0.058 0.028 0.141 2008 3 25 10 40 0 588.0 85.64861 44.81162 -48.88311 0.579 2.021 0.160 0.000 0.034 0.091 0.046 0.046 0.030 0.070 2008 3 25 21 47 0 1372.0 86.38403 46.49441 -44.67231 0.405 2.635 0.007 0.000 0.018 0.128 0.038 0.038 0.026 0.110 2008 3 26 21 53 0 1237.0 87.34132 48.98467 -40.37952 0.268 2.154 0.083 0.000 0.022 0.111 0.025 0.025 0.017 0.068 2008 3 27 19 55 0 1301.0 88.28160 51.91118 -35.43904 0.341 2.635 0.182 0.000 0.025 0.118 0.032 0.032 0.025 0.094 2008 3 28 19 1 0 1314.0 89.24861 54.93598 -29.88145 0.658 5.437 0.022 0.000 0.029 0.244 0.058 0.058 0.026 0.183 2008 3 29 18 16 0 1317.0 90.21840 56.88369 -26.17340 0.419 2.349 0.100 0.000 0.029 0.108 0.032 0.032 0.022 0.063 2008 3 30 17 32 0 1399.0 91.21632 59.92114 -19.81546 0.304 1.601 0.046 0.000 0.008 0.066 0.025 0.025 0.016 0.048 2008 3 31 18 7 0 1305.0 92.20799 62.24533 -14.51065 0.520 3.907 0.065 0.000 0.035 0.185 0.047 0.047 0.032 0.111 2008 4 1 17 10 0 1375.0 93.19271 63.57591 -11.33008 0.481 3.385 0.133 0.000 0.031 0.159 0.043 0.043 0.027 0.104 2008 4 2 17 55 0 783.0 94.01840 65.09546 -5.35086 0.427 3.485 0.126 0.000 0.027 0.165 0.041 0.041 0.021 0.113 2008 4 3 8 8 0 571.0 94.53715 66.40592 -0.58061 0.301 1.237 0.132 0.000 0.019 0.054 0.029 0.029 0.020 0.057 2008 4 3 18 46 0 707.0 95.02743 67.46493 4.27528 0.180 1.070 0.113 0.000 0.035 0.042 0.019 0.019 0.014 0.040 2008 4 4 7 51 0 581.0 95.52882 68.44750 9.00379 0.298 1.758 0.150 0.000 0.012 0.082 0.027 0.027 0.034 0.081 2008 4 4 18 46 0 710.0 96.02847 69.53576 14.40346 0.366 1.874 0.187 0.000 0.028 0.077 0.032 0.032 0.053 0.096 2008 4 5 7 57 0 568.0 96.52847 70.41009 17.27277 0.282 1.596 0.413 0.000 0.020 0.077 0.029 0.029 0.026 0.131 2008 4 5 18 31 0 738.0 97.02778 70.53609 18.41663 0.610 2.637 0.102 0.000 0.026 0.126 0.053 0.053 0.039 0.090 2008 4 6 8 49 18 512.7 97.54559 70.49917 18.99966 0.335 1.819 0.088 0.000 0.025 0.077 0.026 0.026 0.025 0.095 2008 4 6 18 42 17 662.2 98.00931 70.86470 22.32839 0.370 1.197 0.065 0.000 0.017 0.057 0.023 0.023 0.009 0.065 2008 4 7 7 57 0 575.0 98.53090 71.23110 25.12695 0.198 0.520 0.046 0.000 0.014 0.014 0.018 0.018 0.032 0.000 2008 4 7 18 45 0 647.0 99.00590 71.23974 28.26154 0.231 0.702 0.147 0.000 0.020 0.061 0.026 0.026 0.022 0.039 2008 4 8 6 55 0 580.0 99.48958 70.36384 31.45766 0.170 0.643 0.169 0.000 0.034 0.025 0.022 0.022 0.029 0.034 2008 4 8 17 59 0 567.0 99.94618 69.92410 30.32826 0.254 1.183 0.204 0.000 0.023 0.058 0.027 0.027 0.024 0.070 2008 4 9 7 18 0 426.0 100.45208 70.97033 29.67792 0.496 0.922 0.141 0.000 0.054 0.056 0.051 0.051 0.000 0.058 2008 4 9 19 33 0 600.0 101.02292 70.87863 21.40424 0.392 0.920 0.144 0.000 0.044 0.089 0.047 0.047 0.060 0.074 2008 4 10 7 29 0 342.0 101.43056 70.27090 17.64024 0.371 0.781 0.161 0.000 0.025 0.027 0.060 0.060 0.024 0.049 2008 4 11 7 28 0 547.0 102.50104 70.80998 20.77659 0.111 0.175 0.208 0.000 0.026 0.000 0.016 0.016 0.024 0.019 2008 4 13 17 49 0 706.0 104.98750 72.27239 16.50654 0.043 0.095 0.195 0.015 0.012 0.011 0.007 0.007 0.018 0.012 2008 4 14 6 40 0 604.0 105.48750 74.54748 12.62466 0.125 0.211 0.146 0.000 0.018 0.000 0.018 0.018 0.015 0.020 2008 4 14 17 45 0 734.0 105.99444 76.76653 9.85129 0.256 0.821 0.098 0.000 0.019 0.043 0.025 0.025 0.000 0.037 2008 4 15 7 12 0 562.0 106.49514 79.03885 8.82781 0.149 0.625 0.093 0.000 0.014 0.013 0.031 0.031 0.029 0.019 2008 4 15 17 39 0 725.5 106.98733 80.20908 11.08882 0.132 0.151 0.083 0.000 0.015 0.011 0.021 0.021 0.021 0.000 2008 4 16 6 59 0 574.0 107.49028 80.09409 11.24362 0.000 0.000 0.052 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2008 4 16 21 38 0 543.0 108.08993 79.03014 11.37904 0.299 0.373 0.134 0.000 0.037 0.000 0.037 0.037 0.091 0.031 2008 4 17 7 58 0 596.0 108.53889 79.02975 11.38919 0.297 0.641 0.112 0.000 0.000 0.056 0.048 0.048 0.000 0.000 2008 4 17 19 0 0 697.0 109.03368 78.16183 4.20082 0.324 0.953 0.121 0.000 0.040 0.053 0.034 0.034 0.000 0.038 2008 4 18 15 42 0 896.0 109.96528 76.34704 -2.42478 0.217 0.130 0.156 0.000 0.027 0.000 0.022 0.022 0.000 0.000 2008 4 19 7 39 0 598.0 110.52639 75.65462 -2.89311 0.064 0.093 0.153 0.000 0.018 0.000 0.012 0.012 0.024 0.000 2008 4 19 18 39 0 831.0 111.06563 73.56340 -6.81856 0.057 0.359 0.046 0.000 0.000 0.023 0.000 0.000 0.000 0.000 2008 4 20 10 21 0 436.0 111.58264 70.95467 -7.80474 0.092 0.205 0.070 0.000 0.000 0.000 0.000 0.000 0.000 0.000 2008 4 20 18 38 0 723.0 112.02743 70.23685 -13.39988 0.034 0.027 0.073 0.000 0.000 0.000 0.009 0.009 0.000 0.000 2008 4 21 7 44 0 585.0 112.52535 69.88191 -16.26266 0.041 0.001 0.052 0.000 0.000 0.007 0.000 0.000 0.000 0.000 2008 4 21 18 35 0 726.0 113.02639 67.95429 -14.17951 0.490 2.774 0.398 0.000 0.033 0.147 0.050 0.050 0.020 0.114 2008 4 22 8 3 0 577.0 113.53576 65.58756 -12.62950 0.246 2.171 0.078 0.000 0.023 0.108 0.028 0.028 0.000 0.110 2008 4 23 12 35 0 326.0 114.63750 63.23890 -20.59021 0.479 6.451 0.560 0.000 0.096 0.307 0.046 0.046 0.028 0.205