The spatial distribution of precipitation is an important aspect water-related research. use different interpolation schemes in the same catchment may cause large differences and deviations from actual rainfall. Our study analyzes methods rainfall at annual, daily, hourly time scales to provide a comprehensive evaluation. An improved regression-based scheme proposed using principal component regression with residual correction (PCRR) compared inverse distance weighting (IDW) multiple linear...

Abstract Long-term streamflow forecasting is of great significance to the optimal management water resources. However, forecast lead time long-term relatively long and forecasted precipitation within has inherent uncertainty, so major challenges. In this paper, a hybrid model developed improve accuracy by combining random forests (RF) Soil Water Assessment Tool (SWAT). The RF used monthly which further downscaled daily dataset according hydrological similarity principle for use in SWAT...

During a spring intermonsoon cruise in 2004, depth profiles of total and particulate 234 Th the upper 100 m were collected at 36 stations southern South China Sea (SCS), covering surface area ∼1.0 × 10 6 km 2 . Thorium‐234 was sampled by using modified small‐volume MnO co‐precipitation technique, which allows mapping distribution with high spatial resolution. A stratified structure Th/ 238 U disequilibria generally observed water column, suggesting that euphotic zone SCS this season can be...

Depth profiles of total organic carbon (TOC) were measured in spring (2005) and winter (2006) the South China Sea (SCS), largest marginal sea adjacent to North Western Pacific (NWP). Compared TOC NWP, excess (3.2 ± 1.1 μ mol kg −1 ) was revealed intermediate layer SCS at σ θ ∼ 27.2–27.6 (∼1000–1500 m). Below depth 2000 m, concentrations identical between NWP. Based on a one‐dimensional steady state diffusion advection model constrained by potential temperature, we estimated net production...

Accurate determination of the POC/ 234 Th ratio on sinking particles is essential for application as a proxy export particulate organic carbon (POC) from upper ocean. Previous studies have shown that ratios may vary by much two orders magnitude, but mechanism this variability remains poorly understood. In study, and 228 in three particle size classes were examined samples collected 500 m at station South China Sea. Our results indicate changes with given depth are mostly driven simple decay...

Abstract At present, the use of hydrological models is main technical approach for real-time flood forecasting. However, in semi-arid and arid areas, model restricted by data conditions. With accumulation deluge, making full historical mining potential laws, causal relationships other valuable information behind them provide new ideas forecasting study area. This paper develops a hybrid that combines hydrograph generalization method random forest Qiushui River basin middle reaches Yellow...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 507:15-30 (2014) - DOI: https://doi.org/10.3354/meps10824 No detectable effect of CO2 on elemental stoichiometry Emiliania huxleyi in nutrient-limited, acclimated continuous cultures Anja Engel1,2,3,*, Carolina Cisternas Novoa3, Mascha Wurst2, Sonja Endres1,2, Tiantian Tang3,4, Markus Schartau1, Cindy Lee3...

Protein stable isotope fingerprinting (P-SIF) is a method to measure the carbon ratios of whole proteins separated from complex mixtures, including cultures and environmental samples. The goal P-SIF expose links between taxonomic identity metabolic function in microbial ecosystems. To accomplish this, two dimensions chromatography are used sequence resolve sample containing ca. 5-10 mg mixed into 960 fractions. Each fraction then split aliquots: first digested with trypsin for peptide...

Abstract Lithogenic materials such as terrigenous lithogenic particles (TLP) can efficiently promote the formation and sinking of mineral‐associated marine organic matter, acting important ballast potentially playing an role in global carbon cycle. To assess influence TLP on fluxes particulate (POC) other biogeochemical cycles, we construct forcing fields based riverine suspended sediment data then apply them to Community Earth System Model, version 2 (CESM2) modified with ballasting effect...

Abstract Anoxygenic, photosynthetic bacteria are common at redox boundaries. They of interest in microbial ecology and geosciences through their role linking the carbon, sulfur, iron cycles, yet much remains unknown about how flexible carbon metabolism—permitting either autotrophic or heterotrophic growth—is recorded bulk sedimentary lipid biomarker records. Here, we investigated patterns isotope fractionation a model sulfur‐oxidizing bacterium, Allochromatium vinosum DSM 180 T . In one...

To better understand the sources and recycling of labile organic matter in coastal water, we studied carbon isotope signature particulate (POC) amino acids, a major group compounds, on shelf northern South China Sea. In addition, were able to compare effects hypoxia at one station shelf. We found that carbon-weighted average d13C values acids (wAAd13C) generally higher more productive offshore stations than nearshore stations. This acid distribution suggests fraction water originated...

Abstract Identifying the phytoplankton origin of particulate organic matter (POM) in deep ocean is challenging due to changing composition and varied extent decomposition by heterotrophic bacteria zooplankton. Here, we report vertical distributions amino acid stable carbon isotope values (δ 13 C) measured particles South China Sea. Carbon‐weighted δ C generally parallel bulk POM profiles with a positive offset from 2.4‰ surface water 6.0‰ deep. Accordingly, lability model introduced describe...

We investigated how future ocean conditions, and specifically the interaction between temperature CO2, might affect marine aggregate formation physical properties. Initially, mesocosms filled with coastal seawater were subjected to three different treatments of CO2 concentration temperature: 1) 750 ppm 16°C, 2) 20°C, 3) 390 16°C. Diatom-dominated phytoplankton blooms induced in by addition nutrients. In aggregates produced roller tanks using taken from during stages bloom, we measured...

In modern ecosystems, the carbon stable isotope (δ13 C) ratios of consumers generally conform to principle "you are what you eat, +1‰." However, this metric may not apply microbial mat systems where diverse communities, using a variety substrates via multiple assimilation pathways, live in close physical association and phagocytosis is minimal or absent. To interpret δ13 C record Proterozoic early Paleozoic, when mat-based productivity likely was widespread, it necessary understand how...