Biomass burning fuel consumption rates: a field measurement database

Abstract. Landscape fires show large variability in the amount of biomass or fuel consumed per unit area burned. These fuel consumption (FC) rates depend on the biomass available to burn and the fraction of the biomass that is actually combusted, and can be combined with estimates of area burned to assess emissions. While burned area can be detected from space and estimates are becoming more reliable due to improved algorithms and sensors, FC rates are either modeled or taken selectively from the literature. We compiled the peer-reviewed literature on FC rates for various biomes and fuel categories to better understand FC rates and variability, and to provide a~database that can be used to constrain biogeochemical models with fire modules. We compiled in total 76 studies covering 10 biomes including savanna (15 studies, average FC of 4.6 t DM (dry matter) ha−1), tropical forest (n = 19, FC = 126), temperate forest (n = 11, FC = 93), boreal forest (n = 16, FC = 39), pasture (n = 6, FC = 28), crop residue (n = 4, FC = 6.5), chaparral (n = 2, FC = 32), tropical peatland (n = 4, FC = 314), boreal peatland (n = 2, FC = 42), and tundra (n = 1, FC = 40). Within biomes the regional variability in the number of measurements was sometimes large, with e.g. only 3 measurement locations in boreal Russia and 35 sites in North America. Substantial regional differences were found within the defined biomes: for example FC rates of temperate pine forests in the USA were 38% higher than Australian forests dominated by eucalypt trees. Besides showing the differences between biomes, FC estimates were also grouped into different fuel classes. Our results highlight the large variability in FC rates, not only between biomes but also within biomes and fuel classes. This implies that care should be taken with using averaged values, and our comparison with FC rates from GFED3 indicates that also modeling studies have difficulty in representing the dynamics governing FC.

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Biomass burning fuel consumption rates: a field measurement database

Biogeosciences ◽

10.5194/bg-11-7305-2014 ◽

2014 ◽

Vol 11 (24) ◽

pp. 7305-7329 ◽

Cited By ~ 70

Author(s):

T. T. van Leeuwen ◽

G. R. van der Werf ◽

A. A. Hoffmann ◽

R. G. Detmers ◽

G. Rücker ◽

...

Keyword(s):

Fuel Consumption ◽

Regional Differences ◽

Burned Area ◽

Regional Variability ◽

Large Variability ◽

Fire Emissions ◽

Area Burned ◽

Biogeochemical Models ◽

Consumption Rates ◽

The Usa

Abstract. Landscape fires show large variability in the amount of biomass or fuel consumed per unit area burned. Fuel consumption (FC) depends on the biomass available to burn and the fraction of the biomass that is actually combusted, and can be combined with estimates of area burned to assess emissions. While burned area can be detected from space and estimates are becoming more reliable due to improved algorithms and sensors, FC is usually modeled or taken selectively from the literature. We compiled the peer-reviewed literature on FC for various biomes and fuel categories to understand FC and its variability better, and to provide a database that can be used to constrain biogeochemical models with fire modules. We compiled in total 77 studies covering 11 biomes including savanna (15 studies, average FC of 4.6 t DM (dry matter) ha−1 with a standard deviation of 2.2), tropical forest (n = 19, FC = 126 ± 77), temperate forest (n = 12, FC = 58 ± 72), boreal forest (n = 16, FC = 35 ± 24), pasture (n = 4, FC = 28 ± 9.3), shifting cultivation (n = 2, FC = 23, with a range of 4.0–43), crop residue (n = 4, FC = 6.5 ± 9.0), chaparral (n = 3, FC = 27 ± 19), tropical peatland (n = 4, FC = 314 ± 196), boreal peatland (n = 2, FC = 42 [42–43]), and tundra (n = 1, FC = 40). Within biomes the regional variability in the number of measurements was sometimes large, with e.g. only three measurement locations in boreal Russia and 35 sites in North America. Substantial regional differences in FC were found within the defined biomes: for example, FC of temperate pine forests in the USA was 37% lower than Australian forests dominated by eucalypt trees. Besides showing the differences between biomes, FC estimates were also grouped into different fuel classes. Our results highlight the large variability in FC, not only between biomes but also within biomes and fuel classes. This implies that substantial uncertainties are associated with using biome-averaged values to represent FC for whole biomes. Comparing the compiled FC values with co-located Global Fire Emissions Database version 3 (GFED3) FC indicates that modeling studies that aim to represent variability in FC also within biomes, still require improvements as they have difficulty in representing the dynamics governing FC.

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Fire emissions estimates in Siberia: evaluation of uncertainties in area burned, land cover, and fuel consumption

Canadian Journal of Forest Research ◽

10.1139/cjfr-2012-0367 ◽

2013 ◽

Vol 43 (5) ◽

pp. 493-506 ◽

Cited By ~ 34

Author(s):

Elena A. Kukavskaya ◽

Amber J. Soja ◽

Alexander P. Petkov ◽

Evgeni I. Ponomarev ◽

Galina A. Ivanova ◽

...

Keyword(s):

Land Cover ◽

Fuel Consumption ◽

Boreal Forests ◽

Carbon Budget ◽

Natural Disturbance ◽

Weather Conditions ◽

Burned Area ◽

Data Sets ◽

Fire Emissions ◽

Area Burned

Boreal forests constitute the world's largest terrestrial carbon pools. The main natural disturbance in these forests is wildfire, which modifies the carbon budget and atmosphere, directly and indirectly. Wildfire emissions in Russia contribute substantially to the global carbon cycle and have potentially important feedbacks to changing climate. Published estimates of carbon emissions from fires in Russian boreal forests vary greatly depending on the methods and data sets used. We examined various fire and vegetation products used to estimate wildfire emissions for Siberia. Large (up to fivefold) differences in annual and monthly area burned estimates for Siberia were found among four satellite-based fire data sets. Official Russian data were typically less than 10% of satellite estimates. Differences in the estimated proportion of annual burned area within each ecosystem were as much as 40% among five land-cover products. As a result, fuel consumption estimates would be expected to vary widely (3%–98%) depending on the specific vegetation mapping product used and as a function of weather conditions. Verification and validation of burned area and land-cover data sets along with the development of fuel maps and combustion models are essential for accurate Siberian wildfire emission estimates, which are central to balancing the carbon budget and assessing feedbacks to climate change.

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Trends in the Prevalence of Dementia in Japan

International Journal of Alzheimer s Disease ◽

10.1155/2012/956354 ◽

2012 ◽

Vol 2012 ◽

pp. 1-11 ◽

Cited By ~ 19

Author(s):

Hiroko H. Dodge ◽

Teresa J. Buracchio ◽

Gwenith G. Fisher ◽

Yutaka Kiyohara ◽

Kenichi Meguro ◽

...

Keyword(s):

Diagnostic Criteria ◽

Large Population ◽

National Level ◽

Population Attributable Risk ◽

Vascular Diseases ◽

Epidemiological Studies ◽

Regional Variability ◽

Large Variability ◽

Dementia Prevalence ◽

Over Time

There is a paucity of data regarding trends in dementia and its subtype prevalence in Japan. Our aims in the current paper are to: (1) summarize epidemiological studies of dementia in Japan including relevant details of study protocol and diagnostic criteria, (2) compare the age-specific prevalence of all-cause dementia among studies, and (3) assess the trends in Alzheimer's disease (AD) versus vascular dementia (VaD) over time. We reviewed diagnostic criteria, all-cause dementia prevalence, and the AD/VaD ratio from 8 large population studies of dementia in Japan. Compared with the Okinawa 1992 study, studies conducted in 1994, 1998, 2005, and 2008 had a higher prevalence of all-cause dementia using Poisson regression models, after controlling for age and sex. In contrast to the US and some European countries, all-cause dementia prevalence is increasing in Japan. The prevalence of AD as opposed to VaD seems to be increasing over time, but large variability in diagnostic criteria, possible regional variability, and differences in prevalence of subtypes of dementia between men and women make it difficult to draw a conclusion about this trend at the national level. Further studies, for example, comparing the population attributable risk of vascular diseases to the prevalence and incidence of dementia could help to clarify the regional variations in etiological subtypes.

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Labor Productivity and Managerial Efficiency against a Static Technology: The Pennsylvania Iron Industry, 1750–1800

The Journal of Economic History ◽

10.1017/s0022050700104644 ◽

1980 ◽

Vol 40 (1) ◽

pp. 129-136 ◽

Cited By ~ 2

Author(s):

Paul F. Paskoff

Keyword(s):

Eighteenth Century ◽

Fuel Consumption ◽

Labor Productivity ◽

Learning By Doing ◽

Iron Industry ◽

Managerial Efficiency ◽

Before And After ◽

Consumption Rates ◽

The Face

An increase in labor productivity and a reduction of fuel consumption rates were two notable and closely related achievements of the management of Hopewell Forge, an ironworks in eighteenth-century Pennsylvania. Significantly, these economies were realized in the face of technological stasis through learning by doing. The analysis of this accomplishment is cast in the larger context of the performance of the iron industry before and after 1800.

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Little filtered cigars: US sales, flavours, package sizes and prices

Tobacco Control ◽

10.1136/tobaccocontrol-2018-054405 ◽

2018 ◽

Vol 28 (3) ◽

pp. 346-349 ◽

Cited By ~ 1

Author(s):

Doris G Gammon ◽

Todd Rogers ◽

Ellen M Coats ◽

James M Nonnemaker ◽

Lisa Henriksen

Keyword(s):

Regional Differences ◽

Sales Volume ◽

The South ◽

Sales Data ◽

Pack Size ◽

Cigarette Taxes ◽

The Us ◽

The Usa ◽

State And Local ◽

Total Sales

ObjectiveAt least four varieties of little filtered cigars (LFCs) violate the US prohibition on flavoured cigarettes other than menthol. This study characterises the sales of prohibited products and other LFCs by flavour category and pack size, as well as the price of LFCs relative to cigarettes.MethodsUsing retail sales data for 2016, we computed the sales volume in dollars and equivalent units and the percentage of total sales by flavour and pack size for the USA by region and state. Paired t-tests compared the prices for LFCs and cigarettes sold in same-sized packs and cartons.ResultsLFC sales totalled 24 033 equivalent units per 100 000 persons in 2016. Flavoured LFC varieties accounted for almost half (47.5%) of the total sales. LFCs were sold in 12 different pack sizes, but 79.7% of sales were packs of 20. The price of 20-packs averaged $2.41 (SD=$1.49), which was significantly less than cigarettes (M=$5.90, SD=$0.85). Regional differences suggest a greater proportion of menthol/mint LFCs and lower prices in the South than in other regions.ConclusionClassifying all LFCs as cigarettes would require that they be offered in a minimum package of 20, eliminate flavoured varieties other than menthol and increase prices through applicable state and local cigarette taxes.

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Biomass burning fuel consumption dynamics in the tropics and subtropics assessed from satellite

Biogeosciences ◽

10.5194/bg-13-3717-2016 ◽

2016 ◽

Vol 13 (12) ◽

pp. 3717-3734 ◽

Cited By ~ 22

Author(s):

Niels Andela ◽

Guido R. van der Werf ◽

Johannes W. Kaiser ◽

Thijs T. van Leeuwen ◽

Martin J. Wooster ◽

...

Keyword(s):

South America ◽

Fuel Consumption ◽

Spatial Patterns ◽

Field Measurements ◽

Sub Saharan Africa ◽

Burned Area ◽

Return Periods ◽

Sub Saharan ◽

In Fire ◽

Consumption Dynamics

Abstract. Landscape fires occur on a large scale in (sub)tropical savannas and grasslands, affecting ecosystem dynamics, regional air quality and concentrations of atmospheric trace gasses. Fuel consumption per unit of area burned is an important but poorly constrained parameter in fire emission modelling. We combined satellite-derived burned area with fire radiative power (FRP) data to derive fuel consumption estimates for land cover types with low tree cover in South America, Sub-Saharan Africa, and Australia. We developed a new approach to estimate fuel consumption, based on FRP data from the polar-orbiting Moderate Resolution Imaging Spectroradiometer (MODIS) and the geostationary Spinning Enhanced Visible and Infrared Imager (SEVIRI) in combination with MODIS burned-area estimates. The fuel consumption estimates based on the geostationary and polar-orbiting instruments showed good agreement in terms of spatial patterns. We used field measurements of fuel consumption to constrain our results, but the large variation in fuel consumption in both space and time complicated this comparison and absolute fuel consumption estimates remained more uncertain. Spatial patterns in fuel consumption could be partly explained by vegetation productivity and fire return periods. In South America, most fires occurred in savannas with relatively long fire return periods, resulting in comparatively high fuel consumption as opposed to the more frequently burning savannas in Sub-Saharan Africa. Strikingly, we found the infrequently burning interior of Australia to have higher fuel consumption than the more productive but frequently burning savannas in northern Australia. Vegetation type also played an important role in explaining the distribution of fuel consumption, by affecting both fuel build-up rates and fire return periods. Hummock grasslands, which were responsible for a large share of Australian biomass burning, showed larger fuel build-up rates than equally productive grasslands in Africa, although this effect might have been partially driven by the presence of grazers in Africa or differences in landscape management. Finally, land management in the form of deforestation and agriculture also considerably affected fuel consumption regionally. We conclude that combining FRP and burned-area estimates, calibrated against field measurements, is a promising approach in deriving quantitative estimates of fuel consumption. Satellite-derived fuel consumption estimates may both challenge our current understanding of spatiotemporal fuel consumption dynamics and serve as reference datasets to improve biogeochemical modelling approaches. Future field studies especially designed to validate satellite-based products, or airborne remote sensing, may further improve confidence in the absolute fuel consumption estimates which are quickly becoming the weakest link in fire emission estimates.

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Association between wetland presence and incidence of Salmonella enterica serotype Javiana infections in selected US sites, 2005–2011

Epidemiology and Infection ◽

10.1017/s0950268817001790 ◽

2017 ◽

Vol 145 (14) ◽

pp. 2991-2997 ◽

Cited By ~ 7

Author(s):

J. Y. HUANG ◽

M. E. PATRICK ◽

J. MANNERS ◽

A. R. SAPKOTA ◽

K. J. SCHERZINGER ◽

...

Keyword(s):

Active Surveillance ◽

Salmonella Enterica ◽

Regional Differences ◽

Incidence Rates ◽

Foodborne Disease ◽

Surveillance Network ◽

Wetland Type ◽

The Usa ◽

The Relationship ◽

Wetland Cover

SUMMARYSalmonella causes an estimated 1·2 million illnesses annually in the USA. Salmonella enterica serotype Javiana (serotype Javiana) is the fourth most common serotype isolated from humans, with the majority of illnesses occurring in southeastern states. The percentage of wetland cover by wetland type and the average incidence rates of serotype Javiana infection in selected counties of the Foodborne Disease Active Surveillance Network (FoodNet) were examined. This analysis explored the relationship between wetland environments and incidence in order to assess whether regional differences in environmental habitats may be associated with observed variations in incidence. Findings suggest that environmental habitats may support reservoirs or contribute to the persistence of serotype Javiana, and may frequently contribute to the transmission of infection compared with other Salmonella serotypes.

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Global fire emissions estimates during 1997–2015

10.5194/essd-2016-62 ◽

2017 ◽

Cited By ~ 10

Author(s):

Guido R. van der Werf ◽

James T. Randerson ◽

Louis Giglio ◽

Thijs T. van Leeuwen ◽

Yang Chen ◽

...

Keyword(s):

North America ◽

Fuel Consumption ◽

Fire Severity ◽

Emission Factors ◽

Trace Gas ◽

Burned Area ◽

Biogeochemical Model ◽

Fire Dynamics ◽

Fire Emissions ◽

Aerosol Emissions

Abstract. Climate, land use, and other anthropogenic and natural drivers have the potential to influence fire dynamics in many regions. To develop a mechanistic understanding of the changing role of these drivers and their impact on atmospheric composition, long term fire records are needed that fuse information from different satellite and in-situ data streams. Here we describe the fourth version of the Global Fire Emissions Database (GFED) and quantify global fire emissions patterns during 1997–2015. The modeling system, based on the Carnegie-Ames-Stanford-Approach (CASA) biogeochemical model, has several modifications from the previous version and uses higher quality input datasets. Significant upgrades include: 1) new burned area estimates with contributions from small fires, 2) a revised fuel consumption parameterization optimized using field observations, 3) modifications that improve the representation of fuel consumption in frequently burning landscapes, and 4) fire severity estimates that better represent continental differences in burning processes across boreal regions of North America and Eurasia. The new version has a higher spatial resolution (0.25°) and uses a different set of emission factors that separately resolves trace gas and aerosol emissions from temperate and boreal forest ecosystems. Global mean carbon emissions using the burned area dataset with small fires (GFED4s) were 2.2 x 1015 grams carbon per year (Pg C yr-1) during 1997–2015, with a maximum in 1997 (3.0 Pg C yr-1) and minimum in 2013 (1.8 Pg C yr-1). These estimates were 11 % higher than our previous estimates (GFED3) during 1997–2011, when the two datasets overlapped. This increase was the result of a substantial increase in burned area (37 %), mostly due to the inclusion of small fires, and a modest decrease in mean fuel consumption (–19 %) to better match estimates from field studies, primarily in savannas and grasslands. For trace gas and aerosol emissions, differences between GFED4s and GFED3 were often larger due to the use of revised emission factors. If small fire burned area was excluded (GFED4 without the "s" for small fires), average emissions were 1.5 Pg C yr-1. The addition of small fires had the largest impact on emissions in temperate North America, Central America, Europe, and temperate Asia. Our improved dataset provides an internally consistent set of burned area and emissions that may contribute to a better understanding of multi-decadal changes in fire dynamics and their impact on the Earth System. GFED data is available from http://www.globalfiredata.org.

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