Forest Canopy Density Effects on Snowpack across the Climate Gradients of the Western United States Mountain Ranges

2022 ◽  
Author(s):  
Ning Sun ◽  
Hongxiang Yan ◽  
Mark S. Wigmosta ◽  
Jessica Lundquist ◽  
Susan Dickerson‐Lange ◽  
...  
Keyword(s):  
United States ◽  
Forest Canopy ◽  
Western United States ◽  
Canopy Density ◽  
Climate Gradients ◽  
Mountain Ranges ◽  
Density Effects ◽  
Forest Canopy Density

scholarly journals INVESTIGATION OF FOREST CANOPY DENSITY CHANGES IN HYRCANIAN FOREST RESOURCES DURING 1987 TO 2002 USING REMOTE SENSING TECHNOLOGY

2019 ◽  
Vol XLII-4/W18 ◽  
pp. 1031-1034
Author(s):  
M. Taefi Feijani ◽  
S. Azadnejad ◽  
S. Homayouni ◽  
M. Moradi
Keyword(s):  
Time Series ◽  
Forest Canopy ◽  
Spectral Band ◽  
Mixed Forest ◽  
Canopy Density ◽  
Rate Of Growth ◽  
Sensing Technology ◽  
Forest Canopy Density ◽  
Annual Time Series ◽  
Forest Lands

Abstract. Forest canopy density (FCD) of seventeen protected areas of the Caspian Hyrcanian mixed forest are studied here. A modified version of FCD mapper based on spectral band fusion and customized threshold calibration that is optimized for Hyrcanian forests is used for this purpose. In this project, the results of applying the FCD model on three time series of satellite images have been analysed. This classification is based on the FAO standard and consist of four categories such as no-forest, thin, semi-dense and dense. These images, taken with TM and ETM sensors, belong to three-time series between 1987 and 2002. The results of this study indicate that the rate of growth or destruction of forests has been investigated in the regions. Then, using tables and diagrams of variations, the rate of growth or destruction of forest lands in the corresponding period in each class is determined. The FCD model has the ability to study the canopy loading classes in the annual time series.

Pleistocene relief production in Laramide mountain ranges, western United States: Comment and Reply

Geology ◽  
1998 ◽  
Vol 26 (12) ◽  
pp. 1150 ◽  
Author(s):  
Jeffrey P. Schaffer ◽  
Eric E. Small ◽  
Robert S. Anderson
Keyword(s):  
United States ◽  
Western United States ◽  
Mountain Ranges

scholarly journals Ambient Factors Controlling the Wintertime Precipitation Distribution across Mountain Ranges in the Interior Western United States. Part II: Changes in Orographic Precipitation Distribution in a Pseudo–Global Warming Simulation

2019 ◽  
Vol 58 (4) ◽  
pp. 695-715 ◽  
Author(s):  
Xiaoqin Jing ◽  
Bart Geerts ◽  
Yonggang Wang ◽  
Changhai Liu
Keyword(s):  
United States ◽  
Global Warming ◽  
Western United States ◽  
Cmip5 Models ◽  
Cloud Base ◽  
Orographic Precipitation ◽  
Precipitation Distribution ◽  
Mountain Ranges ◽  
Ensemble Mean ◽  
Precipitation Increase

AbstractTwo high-resolution (4 km) regional climate simulations over a 10-yr period are conducted to study the changes in wintertime precipitation distribution across mountain ranges in the interior western United States (IWUS) in a warming climate. One simulation represents the current climate, and another represents an ~2050 climate using a pseudo–global warming approach. The climate perturbations are derived from the ensemble mean of 15 global climate models from phase 5 of the Coupled Model Intercomparison Project (CMIP5). These simulations provide an estimate of average changes in wintertime orographic precipitation enhancement and finescale distribution across mountain ranges. The variability in these changes among CMIP5 models is quantified using statistical downscaling relations between orographic precipitation distribution and upstream conditions, developed in Part I. The CMIP5 guidance indicates a robust warming signal (~2 K) over the IWUS by ~2050 but minor changes in relative humidity and cloud-base height. The IWUS simulations reveal a widespread increase in precipitation on account of higher precipitation rates during winter storms in this warmer climate. This precipitation increase is most significant over the mountains rather than on the surrounding plains. The increase in precipitation rate is largely due to an increase in low-level cross-mountain moisture transport. The application of the statistical relations indicates that individual CMIP5 models disagree about the magnitude and distribution of orographic precipitation change in the IWUS, although most agree with the ensemble-mean-predicted orographic precipitation increase.

scholarly journals Analisis Degradasi Penutup Hutan Di Perkotaan Menggunakan Model Forest Canopy Density Studi Kasus : Kota Bandar Lampung

2019 ◽  
Vol 3 (2) ◽  
pp. 107
Author(s):  
Adam Irwansyah Fauzi ◽  
Agung Budi Harto ◽  
Dudung Muhally Hakim ◽  
Redho Surya Perdana
Keyword(s):  
Forest Canopy ◽  
Canopy Density ◽  
Forest Canopy Density

Salah satu faktor utama terjadinya perubahan iklim yang sedang berlangsung saat ini adalah akibat emisi yang ditimbulkan oleh degradasi hutan, yaitu mencapai sekitar 20% dari seluruh emisi Gas Rumah Kaca (GRK). Di Indonesia, degradasi hutan salah satunya banyak terjadi di kawasan perkotaan, tak terkecuali di Kota Bandar Lampung. Mengingat peran hutan yang begitu vital, banyak bidang-bidang keilmuan yang diaplikasikan untuk mengamati fenomena degradasi hutan, tak terkecuali teknologi penginderaan jauh (inderaja). Salah satu metode pengolahan citra yang sering diaplikasikan untuk mengamati hutan adalah model Forest Canopy Density (FCD). FCD merupakan suatu model yang dikembangkan oleh Atsushi Rikimaru untuk keperluan analisis dan pemantauan perkembangan hutan secara kuantitatif. Dari hasil pengolahan data dan analisis, antara rentang tahun 2009 hingga tahun 2015, Kota Bandar Lampung mengalami degradasi hutan sebesar 1002,75 ha. Meskipun demikian, secara keseluruhan degradasi terjadi pada kawasan budidaya yaitu mencapai 92,03%, sedangkan kawasan lindung hanya terdegradasi sebesar 7,97%. Selain itu, terdapat beberapa wilayah teridentifikasi mengalami peningkatan persentase penutup hutan, diantaranya terdapat pada kawasan hutan, permukiman dan pesisir pantai.

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