A Global Database of Litterfall Mass and Litter Pool Carbon and Nutrients

Holland, Elisabeth A.; Post, W.M.; Matthews, E. M.; Sulzman, James M.; Staufer, R.; Krankina, Olga N.

doi:10.3334/ornldaac/1244

Cited by 6 publications

(4 citation statements)

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“…Additional regional data sets are Thurner et al (2014) for the midlatitude to high latitude of the Northern Hemisphere and Saatchi et al (2011) and Baccini et al (2012) for the tropics (see Table S1 in the supporting information). • Aboveground Litter Carbon comes from the "Global Database of Litterfall Mass and Litter Pool Carbon and Nutrients" (Holland et al, 2015). It includes site measurements of among others aboveground litter 10.1029/2019MS001886 mass and litter carbon dating from 1827 to 1997 (https://daac.ornl.gov/VEGETATION/guides/Global_ Litter_Carbon_Nutrients.html).…”

Section: Evaluation Datamentioning

confidence: 99%

“…There are very few data sets on aboveground litter, let alone belowground litter, to evaluate models. One exception is the "Global Database of Litterfall Mass and Litter Pool Carbon and Nutrients" (Holland et al, 2015) including site measurements of among others aboveground litter carbon dating from 1827 to 1997. To compare our simulation results, we excluded data with reported management.…”

Section: Litter Poolsmentioning

confidence: 99%

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The Global Land Carbon Cycle Simulated With ISBA‐CTRIP: Improvements Over the Last Decade

Delire

Séférian

Decharme

et al. 2020

J Adv Model Earth Syst

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We present the latest version of the ISBA‐CTRIP land surface system, focusing on the representation of the land carbon cycle. We review the main improvements since the year 2012, mainly added modules for wild fires, carbon leaching through soil and transport of dissolved organic carbon to the ocean, and land cover changes but also improved representation of photosynthesis, respiration, and plant functional types. This version of ISBA‐CTRIP is fully described in terms of land carbon pools, fluxes, and their interactions. Results are compared with the previous version in an off‐line mode forced by observed climate during the historical time period. The two simulations are presented to demonstrate the model performance compared to an ensemble of observed and observation‐derived data sets for gross and net primary productivity, heterotrophic and autotrophic respiration, above and below ground biomass, litter, and soil carbon pools. New developments specific to the new version such as burned area, fire emissions, carbon leaching, and land cover are also validated against observations. The results show clearly that the latest version of ISBA‐CTRIP outperforms the former version and reproduces generally well the observed mean spatial patterns in carbon pools and fluxes, as well as the seasonal cycle of leaf area index. The trends of the global fluxes over the last 50 years agree with other global models and with available estimates. This comparison gives us confidence that the model represents the main processes involved in the terrestrial carbon cycle and can be used to explore future global change projections.

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Section: Evaluation Datamentioning

confidence: 99%

Section: Litter Poolsmentioning

confidence: 99%

The Global Land Carbon Cycle Simulated With ISBA‐CTRIP: Improvements Over the Last Decade

Delire

Séférian

Decharme

et al. 2020

J Adv Model Earth Syst

View full text Add to dashboard Cite

show abstract

“…Low carbon flux of mulga of ,149 mg C m À2 day À1 (assuming 50% carbon content and observed average phyllode fall 297 mg m À2 day À1 ) results in ,54 g C m À2 transferred from canopies to the ground every year within the groves of the 'mature-1' site. We note that this is considerably less than mean leaf litterfall observed in other dryland vegetation of 149 g C m À2 year À1 , assuming 50% carbon content (Holland et al 2015). Intergroves have considerably less canopy cover and, based on our data for 'desert form' mulga (Fig.…”

Section: Carbon Cyclingmentioning

confidence: 50%

“…leaf litterfall 260 AE 119 g m À2 year À1 ). An equivalent global summary for drylands has not been undertaken, but Holland et al (2015) collated globally available litterfall observations to 1997 that included 31 records for drylands. The mean leaf litterfall for these 31 records was 298 g m À2 year À1 (range of minimum to maximum of 13-862 g m À2 year À1 ).…”

Section: Introductionmentioning

confidence: 99%

Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall

Turner¹,

Friedel²,

Neumann³

2021

Rangeland J.

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The fall of phyllodes from Acacia aneura F.Muell. ex Benth. (mulga) in central Australia was studied over 22 months from mid-1958 at four locations within a livestock reserve north of Alice Springs in the Northern Territory, in order to identify rainfall or seasonal triggers. Phyllode fall increased by at least an order of magnitude for short periods following rain of 15–20mm or more on a ‘mature’ mulga site and similar trends were apparent for ‘young’ and ‘desert form’ mulga on the same site, and on a second, independent, ‘mature’ site. When rates of phyllode fall were high after substantial rain, at both ‘mature’ locations, ~30% of nitrogen and ~50% of phosphorus were withdrawn before abscission, suggesting that mulga was markedly conservative of these nutrients. Conversely, under dry conditions, when phyllode fall was relatively low (<200mgm−2day−1), concentrations of nitrogen and phosphorus in fallen phyllodes were higher. Concentrations of potassium, calcium, magnesium and sodium did not vary consistently with increasing rate of phyllode fall, although overall levels of calcium and potassium were considerably higher in the second ‘mature’ location. This legacy study is of renewed interest given the potential of mulga communities to contribute to national carbon stocks, and the consequent need for robust field-based data on growth dynamics and carbon fluxes.

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Hourly and daily rainfall intensification causes opposing effects on C and N emissions, storage, and leaching in dry and wet grasslands

2019

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Climate change is expected to alter hourly and daily rainfall regimes and, in turn, the dynamics of ecosystem processes controlling greenhouse gas emissions that affect climate. Here, we investigate the effects of expected twenty-first century changes in hourly and daily rainfall on soil carbon and nitrogen emissions, soil organic matter (SOM) stocks, and leaching using a coupled mechanistic carbon and nitrogen soil biogeochemical model (BAMS2). The model represents various abiotic and biotic processes involving 11 SOM pools. These processes include fungal depolymerization, heterotrophic bacterial mineralization, nitrification, denitrification, microbial mortality, necromass decomposition, microbial response to water stress, protection, aqueous advection and diffusion, aqueous complexation, and gaseous dissolution. Multi-decadal modeling with varying rainfall patterns was conducted on nine Australian grasslands in tropical, temperate, and semi-arid regions. Our results show that annual CO 2 emissions in the semiarid grasslands increase by more than 20% with a 20% increase in annual rainfall (with no changes in the rainfall timing), but the tropical grasslands have opposite trends. A 20% increase in annual rainfall also increases annual N 2 O and NO emissions in the semi-arid grasslands by more than 10% but decreases emissions by at least 25% in the temperate grasslands. When subjected to low frequency and high magnitude daily rainfall events with unchanged annual totals, the semi-arid grasslands are the most sensitive, but changes in annual CO 2 emissions and SOM stocks are less than 5%. Intensification of hourly rainfall did not significantly alter CO 2 emissions and SOM stocks but changed annual NH 3 emissions in the tropical grasslands by more than 300%.

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A Global Database of Litterfall Mass and Litter Pool Carbon and Nutrients

Cited by 6 publications

References 0 publications

The Global Land Carbon Cycle Simulated With ISBA‐CTRIP: Improvements Over the Last Decade

The Global Land Carbon Cycle Simulated With ISBA‐CTRIP: Improvements Over the Last Decade

Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall

Hourly and daily rainfall intensification causes opposing effects on C and N emissions, storage, and leaching in dry and wet grasslands

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