2017-01-012024-05-15https://scholars.lib.ntu.edu.tw/handle/123456789/661753摘要：在台灣，最具特色的陸域生態系統為位於中海拔的雲霧森林，而霧林帶的形成，主要是白天從洋面上吹來蘊含豐富水氣的海風，沿著鄰近的山坡爬升，隨著海拔上升而氣溫下降而凝結成霧，這種因為地形所形成的霧稱為上坡霧。而上坡霧所攜帶的霧水，是霧林生態系統非常重要的水分來源，也協助孕育了許多賴此環境因子為生的原生動植物。台灣四面環海且高山遍布，是相當適合研究雲的地區。近年來地面觀測以及電腦模式的預測顯示，氣候暖化與環境變遷會減緩霧水的形成，以至於雲霧帶有往高海拔攀升的趨勢，這將對台灣本土珍稀的動植物有很大的衝擊。然而很令人驚訝的，我們至今對於最基本且最重要的參數「森林樹冠可攔截霧水」的瞭解仍相當的有限，而能夠做精準的量測也是本研究計畫主要欲達成的目標。研究團隊將以全台灣上坡霧形成頻率最密集的宜蘭棲蘭山做為研究樣區，跨海拔（1000–2000公尺）架設數個短波日照儀，根據林內與林外會因為霧的形成會造成太陽輻射差縮小的現象，間接估測森林樹冠可攔截霧水。本計畫研究成果預期對於暸解氣候暖化對近熱帶山地霧林生態系統的衝擊將有顯著貢獻。<br> Abstract: The most unique terrestrial ecosystems in Taiwan is mid-altitude montane cloud forest. The formation of cloud band in a mountainous region is that when moist wind blows from the sea surface towards mountains, air is lifted up along the mountain slope. Air temperature will drop with the increase of altitude at the lapse rate; water vapor will condense into small water droplets to form fog when the vapor pressure deficit is close to zero. This type of fog is known as “upslope fog”, which is the major water resource to the ecosystem facilitating harboring many endemic species. Taiwan is surrounded by oceans with rugged terrain, which makes it an ideal site study upslope fog. In the recent years, field observations and computer modeled future scenarios revealed that there may be a tendency of cloud band uplifting, which is possibly resulted from elevated temperature. This could cause tremendous impacts on this vulnerable ecosystem. Surprisingly, we still do not know the most fundamental parameter of the fog: Canopy water interception (CWI). Therefore, the main objective of this project is to quantify CWI of Chilan Mountain in the northeastern Taiwan, where is the site that the occurrence of upslope fog is most frequently observed. We will install a set of solar radiation sensors inside and outside (under the open sky condition) the forests. We could estimate CWI based upon the assumption that the occurrence of upslope fog will reduce the difference between the solar radiation measures in/outside the forests. This project will help understand the impacts of climate change on this near tropical montane cloud forest.氣候變遷溫度上升附生植物太陽輻射台灣上坡霧Climate changeelevated temperatureepiphytesolar radiationTaiwanupslope fog