Verification of biogenic emission model version 3 for Taiwan

• Main Authors: Ming-Jhe Lin, 林銘哲
• Other Authors: Ken-Hui Chang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/87688172278732824443

碩士 === 國立雲林科技大學 === 環境與安全工程系碩士班 === 93 === Biogenic VOCs (BVOCs) emission is considered to play an important role in photochemical production of smog. The study is based on BEIS-2（Biogenic Emissions Inventory System Version 2）. It was matched up the land-use database and meterological data of Taiwan to develop TBEIS（Taiwan Biogenic Emissions Inventory System）.The model after expanding which includes leaf temperature energy balance model and can be simulated 33 BVOCs , called Taiwan Biogenic Emission Inventory System Version 3 (TBEIS-3). The simulation needs to be the basis for improving the model accuracy. The purpose of this study uses Tethered balloon method to measure the emissions of biogenic volatile organic compound. The emission flux of calculation would be compared with the modeling results of Taiwan Biogenic Emission Inventory System Version 3 (TBEIS-3). Further to know the simulation error of TBEIS-3. However, the error doesn’t only come from TBEIS-3. In order to know the simulation bias of TBEIS-3.0 itself, the study uses the BVOCs concentration of TAQM to find out the error of emission flux formula. Expecting the new version would be apply to Taiwan air quality modeling more efficiently. The results showed that BVOCs vertical profile mainly affected by gorge wind. Each profile had shown BVOCs concentration variously. By comparison of isoprene concentration which simulated by TAQM model and measured, we could know wind direction is an important parameter, but temperature effect and wind speed would result in TAQM model to be underestimated. According to experiment I made on April 29, 2004, it used the TAQM model to simulate isoprene concentration at 12:00 p.m. and 15:00 p.m. The result would lead to 134.8% ~ 1358.5% uncertainly; the total average error is approximately 560.5%. On the comparison of isoprene emission flux which simulated by TBEIS-3.0 model and estimated by flux formula, most isoprene emission flux are greater than estimated. Using TBEIS-3.0 to simulate isoprene emission flux would lead to the average error is approximately +131% through confirming the error of flux formula. The error of TBEIS-3.0 modeling value is obviously drop by modifying laud-use data. It is necessary to have accurate land-use data. Using radiosonde to measure ambient air temperature、wind velocity and humidity could bring a little error. It caused uncertainty of TBEIS-3.0 modeling value within 5%. For this reason, we can ignore the measurement error of radiosonde.