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社区首页 >专栏 >NASA数据集——1983 ——2016 年期间北美森林地点的野外地块特征数据、衍生的地上和地下燃烧碳以及获取的火灾气象指数(FWI)

NASA数据集——1983 ——2016 年期间北美森林地点的野外地块特征数据、衍生的地上和地下燃烧碳以及获取的火灾气象指数(FWI)

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发布2024-05-24 09:20:58
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发布2024-05-24 09:20:58
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文件修订日期:2022-05-04

数据集版本: 1

简介

该数据集综合了 1983 年至 2016 年期间美国阿拉斯加、西北地区和加拿大萨斯喀彻温省被烧毁的北方森林地点的野外地块特征数据、衍生的地上和地下燃烧碳以及获取的火灾气象指数(FWI)系统组件。此外还包括未烧毁地块的数据。编译的地块级特征数据包括林分年龄、干扰历史、树木密度和树木生物物理测量值,用于计算地上(ag)和地下(bg)生物量/碳库、火灾前和火灾后残余土壤有机层(SOL)深度以及树木结构等级的燃烧估计值。此外,还提供了每个地点的测量坡度和坡向,以及根据地形分配的湿度等级。数据来自 1019 个燃烧过的地点和 152 个未燃烧过的地点。通过对燃烧的农业碳库和生物质碳库以及 SOL 损失的估算,计算出每个地块燃烧的总碳量、燃烧前碳量的比例以及燃烧后碳量占总碳量的比例。根据全球火灾气象数据库中的地块位置、燃烧年份和动态启动日期(燃烧日,DOB),从现有数据源获取每个地块的 FWI 系统组件,包括湿度和干旱代码以及火灾危险指数。土壤特性数据包含在一个单独的文件中。 野外研究横跨北美西部北方森林的六个生态区,捕捉了火灾前树木生产力、林龄和生态系统碳储存条件的广泛梯度。它还包括以 DOB 和 FWI 系统指数为代表的气象控制,以及火灾后残余土壤有机层深度的测量和燃烧深度的重建,以及上部和下部碳燃烧的重建。

该数据集包含两个逗号分隔(.csv)格式的数据文件。

野外地点、生态区和研究区域内每个生态区的烧毁总面积(百万公顷)随时间变化的情况。插图中的灰色虚线表示所有生态区烧毁面积的简单线性回归,红色阴影表示 95% 的置信区间。分析使用野外地点分组完成,这些地点位于 EPA 北美二级生态区所定义的六个生态区内。资料来源:Walker 等人,2020 年:Walker 等人,2020 年。

数据特征

空间覆盖范围: 阿拉斯加和加拿大

上方参考位置:

域:核心和扩展

州/地区: 阿拉斯加和加拿大阿拉斯加和加拿大

网格单元(ABoVE 域中有 108 个单元):

ABoVE grid cells

Ah1Av1Bh6Bv6Ch41Cv36

Ah1Av1Bh7Bv7Ch42Cv45

Ah1Av0Bh6Bv5Ch36Cv32

Ah1Av0Bh7Bv3Ch44Cv23

Ah1Av0Bh7Bv4Ch42Cv24

Ah1Av0Bh7Bv4Ch43Cv24

Ah1Av0Bh6Bv4Ch40Cv25

Ah1Av0Bh6Bv4Ch41Cv26

Ah1Av0Bh6Bv4Ch40Cv27

Ah1Av0Bh6Bv4Ch40Cv28

Ah1Av0Bh6Bv4Ch41Cv28

Ah1Av0Bh6Bv4Ch38Cv29

Ah1Av0Bh6Bv4Ch40Cv29

Ah1Av0Bh6Bv4Ch41Cv29

Ah1Av0Bh7Bv4Ch45Cv29

Ah1Av0Bh6Bv5Ch39Cv30

Ah1Av0Bh6Bv5Ch40Cv30

Ah1Av0Bh6Bv5Ch41Cv30

Ah1Av0Bh6Bv5Ch40Cv31

Ah1Av0Bh6Bv5Ch38Cv32

Ah1Av0Bh6Bv5Ch39Cv32

Ah1Av0Bh6Bv5Ch40Cv32

Ah1Av0Bh6Bv5Ch41Cv32

Ah1Av0Bh7Bv5Ch42Cv32

Ah1Av0Bh6Bv5Ch40Cv33

Ah1Av0Bh7Bv5Ch43Cv33

Ah1Av0Bh7Bv5Ch44Cv33

Ah1Av0Bh7Bv5Ch45Cv33

Ah1Av0Bh6Bv5Ch40Cv34

Ah1Av0Bh6Bv5Ch41Cv34

Ah1Av0Bh7Bv5Ch42Cv34

Ah1Av0Bh7Bv5Ch45Cv34

Ah1Av1Bh6Bv6Ch40Cv37

Ah1Av1Bh6Bv6Ch40Cv38

Ah1Av1Bh6Bv6Ch41Cv39

Ah1Av1Bh6Bv6Ch41Cv40

Ah1Av1Bh7Bv6Ch42Cv40

Ah1Av1Bh7Bv6Ch46Cv40

Ah1Av1Bh6Bv6Ch41Cv41

Ah1Av1Bh7Bv6Ch43Cv41

Ah1Av1Bh7Bv6Ch44Cv41

Ah1Av1Bh7Bv6Ch45Cv41

Ah1Av1Bh6Bv7Ch41Cv42

Ah1Av1Bh7Bv7Ch42Cv42

Ah1Av1Bh7Bv7Ch43Cv42

Ah1Av1Bh7Bv7Ch42Cv43

Ah1Av1Bh8Bv7Ch49Cv44

Ah1Av1Bh7Bv7Ch43Cv45

Ah1Av1Bh11Bv11Ch70Cv67

Ah1Av1Bh11Bv11Ch71Cv68

Ah2Av1Bh12Bv11Ch75Cv71

Ah2Av1Bh12Bv11Ch76Cv71

Ah2Av1Bh13Bv9Ch79Cv59

Ah2Av1Bh13Bv9Ch80Cv59

Ah2Av1Bh14Bv10Ch84Cv61

Ah2Av1Bh13Bv10Ch83Cv64

Ah2Av1Bh14Bv10Ch84Cv64

Ah2Av1Bh13Bv10Ch79Cv65

Ah2Av1Bh13Bv10Ch83Cv65

Ah2Av1Bh14Bv10Ch84Cv65

Ah2Av1Bh13Bv11Ch78Cv66

Ah2Av1Bh13Bv11Ch79Cv66

Ah2Av1Bh13Bv11Ch83Cv66

Ah2Av1Bh14Bv11Ch84Cv66

Ah2Av1Bh13Bv11Ch78Cv67

Ah2Av1Bh13Bv11Ch79Cv67

Ah2Av1Bh13Bv11Ch83Cv67

Ah2Av1Bh14Bv11Ch84Cv67

Ah2Av1Bh12Bv11Ch77Cv68

Ah2Av1Bh13Bv11Ch78Cv68

Ah2Av1Bh14Bv11Ch84Cv68

Ah2Av1Bh12Bv11Ch73Cv69

Ah2Av1Bh12Bv11Ch76Cv69

Ah2Av1Bh12Bv11Ch74Cv70

Ah2Av1Bh12Bv11Ch75Cv70

Ah2Av1Bh12Bv11Ch76Cv70

Ah2Av1Bh12Bv11Ch77Cv71

Ah2Av2Bh13Bv12Ch79Cv73

Ah2Av2Bh13Bv12Ch80Cv73

Ah2Av2Bh13Bv12Ch80Cv74

Ah2Av2Bh13Bv12Ch80Cv75

Ah2Av2Bh13Bv12Ch81Cv75

Ah2Av2Bh14Bv4Ch87Cv88

Ah2Av2Bh13Bv4Ch82Cv89

Ah2Av2Bh14Bv4Ch87Cv89

Ah2Av2Bh13Bv5Ch82Cv90

Ah2Av2Bh14Bv5Ch87Cv90

Ah2Av2Bh15Bv5Ch95Cv95

Ah2Av2Bh15Bv6Ch94Cv96

Ah2Av2Bh15Bv6Ch92Cv97

Ah2Av2Bh15Bv6Ch93Cv97

Ah2Av2Bh15Bv6Ch94Cv97

Ah2Av2Bh14Bv6Ch88Cv98

Ah2Av2Bh15Bv6Ch91Cv99

Ah2Av2Bh15Bv6Ch91Cv100

Ah2Av2Bh15Bv6Ch92Cv100

Ah2Av2Bh15Bv6Ch91Cv101

Ah2Av2Bh15Bv6Ch92Cv101

Ah2Av2Bh15Bv7Ch92Cv102

Ah2Av2Bh12Bv12Ch75Cv72

Ah2Av2Bh12Bv12Ch77Cv72

Ah2Av2Bh13Bv12Ch78Cv72

Ah3Av2Bh18Bv15Ch108Cv95

Ah3Av2Bh18Bv5Ch109Cv95

Ah3Av2Bh18Bv6Ch109Cv96

Ah3Av2Bh21Bv7Ch128Cv104

Ah3Av2Bh21Bv7Ch129Cv104

Ah3Av2Bh21Bv7Ch129Cv105

空间分辨率:多点

时间覆盖范围1983-01-01 至 2016-08-08

时间分辨率可变

研究区域(所有经纬度均以十进制度表示)

Site

Westernmost Longitude

Easternmost Longitude

Northernmost Latitude

Southernmost Latitude

Alaska and Canada

-150.902

-88.61199

67.22972

53.19106

数据文件信息

该数据集有两个逗号分隔(.csv)格式的数据文件。

AK_CA_Burned_Plot_Data_1983_2016.csv.该文件汇编了 1983 年至 2016 年期间从阿拉斯加和加拿大烧毁和未烧毁地点的地块中收集的数据,以及从这些变量中得出的数据。

AK_CA_Soil_Profile_Synthesis.csv。该文件汇编了从烧毁和未烧毁地点的地块中收集的土壤数据。

表 2.AK_CA_Burned_Plot_Data_1983_2016.csv 中的变量。注:说明中的 * 表示由调查人员计算或分配的变量。FWI 系统的组成部分是根据每日天气条件计算得出的,包括三个燃料水分代码和三个火灾行为指数。

Variable

Units

Description

project_id

Unique id associated with this project

project_name

Project name

treatment

Burned or control plot

site

Site name/number

burn_name

Name of fire site

burn_year

YYYY

Year of burn

ecoregion_name_l2

US EPA Ecoregion Level 2 (Ecoregions | US EPA)

latitude

decimal degrees

Latitude. GPS. Datum: WSG84 Position format: ddd.ddddd

longitude

decimal degrees

Longitude. GPS. Datum: WSG84 Position format: ddd.ddddd

accuracy_horizontal

meters

Horizontal accuracy

elevation

meters

GPS. Meters above sea level

accuracy_vertical

meters

vertical accuracy

slope

degrees

Slope in degrees

aspect

degrees

Slope aspect in compass degrees (0 to 360) - has not been corrected for declination

moisture

unitless

Ranking of plot moisture potential using the moisture key presented in the successional trajectories workbook (Johnstone). Values range from 1 to 6, where 1=xeric, 2=subxeric, 3=subxeric to mesic, 4=mesic, 5=submesic, 6=subhygric

stand_density

stems/m2

Estimated density of pre-fire stems per m2 for the pre-fire stand. All trees and saplings that were alive at the time fires are included

stand_basal_area

cm2/cm2

Total measured basal area (cm2) of pre-fire tree species expressed on a per m2 basis. Basal area was calculated from stem diameter at breast height (area of each tree=pie(dbh/2)2)

prop_black_spruce

0-1

Proportion of black spruce trees in a site (range 0-1)

stand_age

year

Age of stand at time of fire - based on tree ring counts

stand_origin

Description of stand origin - e.g. fire, logging, unknown

ag_biomass_prefire

g/m2

Pre-fire aboveground biomass

ag_c_prefire

g C /m2

Pre-fire above ground carbon pool

ag_biomass_combusted

g/m2

Above-ground biomass combusted

ag_c_combusted

g C/m2

Above-ground carbon pool combusted

prefire_sol

cm

Depth of pre-fire SOL calculated as the sum of the residual SOL and the SOL burn depth

mean_residual_org_layer_depth

cm

Mean of residual organic layer depth

burn_depth

cm

Depth of burn

prop_sol_combusted

0-1

Proportion of the soil organic layer combusted (depth of burn/pre-fire SOL)

residual_sol_c

g C/m2

Residual SOL C

bg_c_prefire

g C/m2

Pre-fire belowground carbon pool (g C m2)

bg_c_combusted

g C/m2

Below-ground carbon combusted (g C m2)

prop_sol_c_combusted

0-1

Proportion of the soil organic layer C combusted (bg_c_combusted/bg_c_prefire)

total_c_pool_prefire

g c/m2

Total pre-fire carbon pool. Sum of above and below ground pre-fire C pools

prop_prefire_bg_c

0-1

Proportion of the total pre-fire C pool attributed to the below-ground component (bg_c_prefire/total_c_pool_prefire)

total_c_combusted

g c/m2

Total carbon combusted. Sum of above and below-ground C combusted *

prop_total_bg_c_combusted

0-1

Proportion of the total C combusted attributed to the below-ground component (bg_c_combusted/total_c_combusted) *

prop_total_prefire_c_combusted

0-1

Proportion of the total pre-fire C pool combusted (total_c_combusted/total_c_pool_prefire) *

dob

Day of Burn

precipitation

mm

Precipitation - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

temperature

degree C

Temperature - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

relative_humidity

%

Relative Humidity - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

wind_speed

m/s

Wind speed obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

drought_code

Drought Code (DC) - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

drought_moisture_code

Drought Moisture Code (DMC) - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

fine_fuel_moisture_code

Fine Fuel Moisture Code (FFMC) - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

initial_spread_index

Initial Spread Index (ISI) - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

buildup_index

Build-up Index (BUI) - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

fire_weather_index

Fire Weather Index (FWI) - obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

daily_severity_rank

Daily Severity Ranking (DSR)- obtained from GFWED based on input variables from MERRA 2. MERRA 2 from Field et al. 2015 *

AK_CA_Soil_Profile_Synthesis.csv 文件中的变量。

Variable

Units

Description

site

Study site

project_name

Project name of acquired data

id

ID

project_id

Unique id associated with this project

plot

Plot name

latitude

Decimal degrees

Latitude of site

longitude

Decimal degrees

Longitude of site

treatment

Burned or control (plot)

profile

Soil profiles

min_org

Mineral (min) or organic (org) soil. Mineral soil characteristics were only obtained from Boby et al. 2010 and were not included in any additional analyses

horizon

Soil horizon

raw_depth

cm

Depth in the profile (maximum depth in the profile)

adjusted_depth

cm

SOL profile depth measurements adjusted based on combusted (maximum depth in the profile)

sample_depth

cm

Sample depth

fine_coarse

How the soil was divided into coarse or fine fractions (0=no divide, 1=2mm)

fine_bulk_density

g/cm3

Fine soil bulk density

coarse_ bulk_density

g/cm3

Coarse soil bulk density

total_ bulk_density

g/cm3

Total bulk density

fine_carbon

%

Percent carbon content in fine soil

fine_nitrogen

%

Percent nitrogen content in fine soil

ph

Soil pH

dry_matter

g/m2

Grams of dry matter per m2= fine bulk density * sample depth *10 000

carbon

g C/m2

Grams of carbon per m2 = g.dry.matter.m2 * fine_c

应用与推导

编制该数据集的目的是评估整个北美西北部寒带地区火灾碳排放的驱动因素。

质量评估

在所有研究中,计算基本遵循 Walker 等人 2018 年的方法。

数据采集、材料和方法

研究领域

研究人员从北美西部北方森林的 1,019 个烧毁地点和 152 个对照地点(即没有火灾历史记录)获取了数据,这些地点横跨六个不同的生态区,近几十年来,这些地区的烧毁面积有所增加(图 1)。研究地点位于阿拉斯加内陆北方地区、北方科迪勒拉山系、泰加平原、泰加盾林、软木盾林和北方平原等生态区域,这些生态区域在地质历史、土壤发育和母质以及年平均温度和降水量方面各不相同(Wang 等,2016 年)。 不同研究的地点选择和取样方法各不相同,但都提供了与火灾前树种组成、林龄、地形以及火灾前后地上和地下碳库相关的实地收集数据。

代码

代码语言:javascript
复制
!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="ABoVE_Plot_Data_Burned_Sites_1744",
    cloud_hosted=True,
    bounding_box=(-150.9, 53.19, -88.61, 67.23),
    temporal=("2017-07-20", "2017-08-08"),
    count=-1,  # use -1 to return all datasets
    return_gdf=True,
)
 
 
gdf.explore()
 
#leafmap.nasa_data_download(results[:5], out_dir="data")

引用

Walker, X.J., J.L. Baltzer, L.L. Bourgeau-Chavez, N.J. Day, W.J. De groot, C. Dieleman, E.E. Hoy, J.F. Johnstone, E.S. Kane, M.A. Parisien, S. Potter, B.M. Rogers, M.R. Turetsky, S. Veraverbeke, E. Whitman, and M.C. Mack. 2020. ABoVE: Synthesis of Burned and Unburned Forest Site Data, AK and Canada, 1983-2016. ORNL DAAC, Oak Ridge, Tennessee, USA. ABoVE: Synthesis of Burned and Unburned Forest Site Data, AK and Canada, 1983-2016, https://doi.org/10.3334/ORNLDAAC/1744

网址推荐

0代码在线构建地图应用

https://sso.mapmost.com/#/login?source_inviter=nClSZANO

机器学习

https://www.cbedai.net/xg

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目录
  • 简介
    • 数据特征
      • 数据文件信息
      • 应用与推导
      • 质量评估
      • 数据采集、材料和方法
        • 研究领域
        • 代码
        • 引用
          • 网址推荐
            • 0代码在线构建地图应用
              • 机器学习
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