RELATIONSHIP BETWEEN BACK TRAJECTORIES AND TROPOSPHERIC TRACE GAS CONCENTRATIONS IN RURAL VIRGINIA

被引:39
作者
MOY, LA [1 ]
DICKERSON, RR [1 ]
RYAN, WF [1 ]
机构
[1] UNIV MARYLAND,DEPT METEOROL,COLLEGE PK,MD 20742
基金
美国海洋和大气管理局; 美国国家科学基金会;
关键词
BACK TRAJECTORIES; PHOTOCHEMICAL SMOG; SYNOPTIC CLIMATOLOGY;
D O I
10.1016/1352-2310(94)90082-5
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The day-to-day variations in mixing ratios of trace gases carbon monoxide (CO), ozone (O3), and total reactive nitrogen (NO(y)) at rural Shenandoah National Park, VA, are explained to a large extent by the circulation of the air prior to arrival. Using 48 h back trajectories, we analyzed the variability of air quality. In one approach, we separated the highest 2% and lowest 32% of NO(y) mixing ratio, and compared composite sets of back trajectories for each group. In the ''dirty'' group, the air passed over the industrialized Midwest more frequently than in the ''clean'' group (51 vs 23%). When air from the industrialized Midwest was clean, its travel had often been interrupted by convective clouds that mix pollutants vertically and wash out soluble species. Radar summaries show that 80% of the clean trajectories from the northwest passed through areas of convection. In a second approach, we clustered daily trajectories into groups with similar circulation patterns. The cleanest air was associated with rapid westerly flow and strong subsidence, or with origins in the less-populated areas to the south and southeast of the Park. The highest levels of photochemical smog were not associated with stagnation and local emissions, or even transport from the nearby Washington metropolitan area. The dirtiest days resulted from slow air circulation and transport from the industrialized Midwest (as seen from the first approach).
引用
收藏
页码:2789 / 2800
页数:12
相关论文
共 46 条
  • [1] PHOTOCHEMICAL THEORY OF TROPOSPHERIC OZONE
    CHAMEIDES, W
    WALKER, JCG
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH, 1973, 78 (36): : 8751 - 8760
  • [2] THE ROLE OF BIOGENIC HYDROCARBONS IN URBAN PHOTOCHEMICAL SMOG - ATLANTA AS A CASE-STUDY
    CHAMEIDES, WL
    LINDSAY, RW
    RICHARDSON, J
    KIANG, CS
    [J]. SCIENCE, 1988, 241 (4872) : 1473 - 1475
  • [3] DISCUSSION OF CHEMISTRY OF SOME MINOR CONSTITUENTS IN STRATOSPHERE AND TROPOSPHERE
    CRUTZEN, P
    [J]. PURE AND APPLIED GEOPHYSICS, 1973, 106 (5-7) : 1385 - 1399
  • [4] PHOTOCHEMICAL REACTIONS INITIATED BY AND INFLUENCING OZONE IN UNPOLLUTED TROPOSPHERIC AIR
    CRUTZEN, PJ
    [J]. TELLUS, 1974, 26 (1-2): : 47 - 57
  • [5] OBSERVATIONS OF TROPOSPHERIC TRACE GASES AND METEOROLOGY IN RURAL VIRGINIA USING AN UNATTENDED MONITORING-SYSTEM - HURRICANE HUGO (1989), A CASE-STUDY
    DODDRIDGE, BG
    DICKERSON, RR
    HOLLAND, JZ
    COOPER, JN
    WARDELL, RG
    POULIDA, O
    WATKINS, JG
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1991, 96 (D5) : 9341 - 9360
  • [6] TRACE GAS CONCENTRATIONS AND METEOROLOGY IN RURAL VIRGINIA .2. REACTIVE NITROGEN-COMPOUNDS
    DODDRIDGE, BG
    DICKERSON, RR
    WARDELL, RG
    CIVEROLO, KL
    NUNNERMACKER, LJ
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1992, 97 (D18) : 20631 - 20646
  • [7] DRAXLER RR, 1991, J APPL METEOROL, V30, P1446, DOI 10.1175/1520-0450(1991)030<1446:TAOTDA>2.0.CO
  • [8] 2
  • [9] DRAXLER RR, 1992, ERL ARL195 TECHN MEM
  • [10] FERNAU ME, 1990, J APPL METEOROL, V29, P751, DOI [10.1175/1520-0450(1990)029<0751:UOCATD>2.0.CO