Modeling of long-range transport on taiwan's acid deposition under different weather conditions

Ken Hui Chang, Fu Tien Jeng, Ya Ling Tsai, Pay Liam Lin

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

The long-range and transboundary transport of acid deposition precursors in East Asia has become an important issue due to the industrial development in this area in recent years. To represent an entire year's impact by long-range transport for Taiwan's acid deposition, six episodes in 1993 were selected for study using Taiwan Air Quality Model, which was developed on the basis of the Regional Acid Deposition Model system. The six episodes cover five types of weather conditions including the Northeasterly monsoon, Spring stationary front, Mei-Yu front, Summer shower, and Autumn front. Two emission conditions were simulated for each episode to quantify the long-range transport effect. One condition takes all emissions within the simulated domain into account as a base case, while another condition excludes Taiwan's emission and considers all of the other emissions as a control case. The results of the present study indicate that contributions of long-range transport to Taiwan's sulfur depositions range from 9 to 45% and nitrogen depositions from 6 to 33% for the six episodes. The most serious effect of long-range transport is the northeasterly monsoon episode for both total sulfur and total nitrogen deposition. The entire year contribution by long-range transport is estimated to be 39% for wet sulfate deposition, and 37% for wet nitrogen deposition for Taiwan. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)3281-3295
Number of pages15
JournalAtmospheric Environment
Volume34
Issue number20
DOIs
StatePublished - 2000

Keywords

  • Air quality model
  • Impact ratio
  • Nitrogen deposition
  • Sulfur deposition
  • Transboundary transport

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