如何利用火灾数据和衍生指标来研究北极地区森林的生态系统?

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【摘要】 Fire Intensity and Burn Severity Metrics for Circumpolar Boreal Forests, 2001-2013简介该数据集提供的产品描述了北欧亚大陆和北美极地森林火灾造成的短期和长期生态系统变化。数据包括火灾强度(火灾辐射功率;FRP)、春季反照率增加、树木覆盖率下降、归一化燃烧率、归一化差异植被指数和地表温度,以及三个衍生的火灾指标:树...

Fire Intensity and Burn Severity Metrics for Circumpolar Boreal Forests, 2001-2013

简介

该数据集提供的产品描述了北欧亚大陆和北美极地森林火灾造成的短期和长期生态系统变化。数据包括火灾强度(火灾辐射功率;FRP)、春季反照率增加、树木覆盖率下降、归一化燃烧率、归一化差异植被指数和地表温度,以及三个衍生的火灾指标:树冠烧焦、植被破坏和火灾引起的树木死亡率。长期变化由火灾发生 5-12 年后确定的平均反照率、火灾发生 5-7 年后树木覆盖率平均下降百分比和年平均燃烧百分比表示。数据涵盖 2001-2013 年期间,以四分之一、半度和一度分辨率提供 40 至 80 度北极地区内的北方森林。数据来自各种来源,包括 MODIS 产品、气候再分析数据和森林清查。其中包括根据气候和植被类型确定的北方森林面积(像素)的数据文件,以及确定的北美和欧亚北方森林研究区域的文件。

摘要

This data set provides 42 data files in GeoTIFF (.tif) format which includes 14 variables in quarter degree, half degree, and one degree resolution.

Table 1.  File names and descriptions (Note that XX in the file names represents quarter degree, half degree, or one degree resolution) 

File names: Description
fire_radiative_power_XX.tif Mean fire radiative power from Aqua and Terra (MW) from 2003-2013
spring_albedo_XX_degree.tif Mean change in spring albedeo one year after fires from 2001-2012
tree_cover_decrease_XX_degree.tif Mean decrease in tree cover after fires from 2001-2009, provided as a percent
normalized_burn_ratio_XX_degree.tif Mean dNBR from 2001-2012
NDVI_XX.tif Mean change in NDVI after fires from 2001-2012
day_land_surface_temp_XX_degree.tif Mean change in daytime land surface temperature (degrees Celsius) from Aqua from 2003-2012
crown_scorch_XX.tif Mean crown scorch index (0-1) from 2003-2009
veg_destructive_index_XX_degree.tif Mean vegetation destruction (0-1) from 2003-2012
Tree_mortality_XX.tif Mean tree mortality (long-term) from 2001-2005, provided as a percent
spring_albedo_5to12_yrs_XX_degree.tif Mean change in spring albedo 5-12 years after fires from 2001-2008
tree_cover_decrease_5to7_yrs_XX_degree.tif Mean decrease in tree cover 5-7 years after fires, provided as a percent
pct_burned_XX.tif Mean annual burned in boreal pixels from 2001-2012, provided as a percent
pct_boreal_pixel_XX.tif Boreal pixels, including water, provided as a percent
boreal_regions_XX_degree.tif Regional mask for boreal forest regions

Table 2.  All files have the following properties:

Map units # bands Data type Fill value Westernmost Longitude Easternmost Longitude Northernmost Latitude Southernmost Latitude
degree 1 float32 for most files. The boreal_regions_XX files (boreal masks) are data type Int16. -9999 -180 180 80 40

代码

!pip install leafmap
!pip install pandas
!pip install folium
!pip install matplotlib
!pip install mapclassify
 
import pandas as pd
import leafmap
 
url = "https://github.com/opengeos/NASA-Earth-Data/raw/main/nasa_earth_data.tsv"
df = pd.read_csv(url, sep="\t")
df
 
leafmap.nasa_data_login()
results, gdf = leafmap.nasa_data_search(
    short_name="Boreal_Fire_Severity_Metrics_1520",
    cloud_hosted=True,
    bounding_box=(-180.0, 40.0, 180.0, 80.0),
    temporal=("2001-01-01", "2013-12-31"),
    count=-1,  # use -1 to return all datasets
    return_gdf=True,
)
gdf.explore()
 
#leafmap.nasa_data_download(results[:5], out_dir="data")

引用

Rogers, B.M., A.J. Soja, M.L. Goulden, and J.T. Randerson. 2017. Fire Intensity and Burn Severity Metrics for Circumpolar Boreal Forests, 2001-2013. ORNL DAAC, Oak Ridge, Tennessee, USA.

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