Fengling yu

Xiamen University | XMU · State Key Laboratory of Marine Environmental Science

Marine carbon storage plays a crucial role in reducing global greenhouse gas emissions. To ensure the efficient and safe storage of CO2, it is imperative to monitor the potential migration of CO2 before, during, and after injection. Current methods for monitoring marine carbon storage encompass built-in sensor monitoring focusing on the seabed well...

The 3rd Offshore Carbon Capture, Utilization and Storage Forum, Summary Report, Xiamen University, China, 12th-15th November, 2023.

The southeastern China coast is a region of special interest in the study of past and present relative sea-level change, given its distal location from giant ice sheets (far-field regions). During the past decades, a large number of biological, geological, and archaeological sea-level indicators have been retrieved from the Fujian coastal region wh...

To investigate the relationship between the alkenone unsaturation index (U K′37 ) and sea surface temperature (SST) in coastal and continental shelf waters, 58 surface sediment samples were collected from the South China Sea (SCS), Taiwan Strait, and East China Sea (ECS). We combined the new results with the previously published 71 data points from...

Holocene paleoclimate reconstructions and comparisons largely rely on accurate age-depth modeling. However, uncertainties in chronology, such as those caused by sparse radiocarbon dates, will hamper inter-core comparisons and correlations, and might result in misleading “cause and consequence” conclusions. This study aimed to find a solution to inc...

Indices based on branched glycerol dialkyl glycerol tetraethers (brGDGTs) have been useful in paleo-environmental reconstructions, although their applicability in river-estuarine sediments remains unclear. This study aims to investigate the correlation between brGDGT-based indices and modern environmental parameters, and to discuss possible impact...

This study investigates the reliability of phytolith assemblage analysis for characterizing subtropical vegetation and explores the potential for using these modern phytolith-vegetation relationships for paleoenvironmental interpretation in southeastern China. The samples were collected from five common subtropical vegetation communities in the Dai...

An improved understanding of past interactions between terrestrial vegetation and various forcings, such as climate change, human impact, and paleofire, is crucial for assessing impacts of future global change on terrestrial ecosystems. This study seeks to find the key factor or factors that have driven Holocene vegetation change along the East Asi...

Suspended particulate organic carbon (POC) and sedimentary total organic carbon (TOC) in coastal areas play critical roles in the global carbon cycle, yet sources and dynamics of coastal POC and TOC have been affected by various anthropogenic activities such as aquaculture, sewage discharge, dam construction and land reclamation. To better understa...

Recently, glycerol dialkyl glycerol tetraethers (GDGTs) have been successfully used to identify different sources for organic-matter in the offshore and open ocean areas, while their applicability in the coastal areas remains unclear. This study was carried out to investigate the behavior of GDGTs and their applicability as indicators for organic-m...

Microbial eukaryotes are pivotal components of marine ecosystems. However, compared with the pelagic environments, the diversity distribution and the driving mechanisms of microbial eukaryotes in the marine sediments have rarely been explored. In this study, sediment cores were collected along a transect from inner to outer Dongshan Bay, southeast...

Estuarine turbidity maxima (ETM) is a transition zone subject to the influence of river flow and tides. Here we showed the distinct impacts of fluvial and tidal hydrodynamics on dissolved inorganic nitrogen (DIN) cycling and export across the ETM to coast. We conducted tidal-scale hourly measurements at the ETM zone of the Jiulong River Estuary in...

How do humans affect the ways that Asia’s mega rivers deliver sediment and dissolved matter to farms, river deltas, and, eventually, the sea? A proposed study would construct an integrated picture.

An observation study was conducted at three stations in the inner regime of the Jiulong River estuary to examine the tidal mixing asymmetry and its associated residual flow induced by eddy viscosity-shear covariance (ESCO). The water columns at the observation stations were approximately well-mixed during the later flood and were stratified during...

The inner regime of an estuary has unique tidal mixing processes but received relatively less attention. A numerical model was developed to investigate the tidal variability of vertical mixing and the residual flow induced by eddy viscosity–shear covariance (ESCO) in the inner regime of a tidally energetic estuary in Southeastern China. Because of...

The Pearl River Delta (PRD) in China is severely affected by intensive human activities. In this study, we used surficial sediments collected in its Lingding Bay (LDB) in December 2016 to analyse the grain size and organic carbon composition and to identify the recent human impact recorded in the sediments. We examined the temporal variations in th...

Higher nitrogen fluxes through estuaries increase the risk of harmful algal blooms, may expand eutrophication and can cause hypoxia within estuaries and the adjacent coastal areas. However, the key factors controlling dissolved inorganic nitrogen (DIN) concentrations and export from hydrologically dynamic and turbid estuarine systems are still poor...

We assess the relative contributions of different sources of organic matter, marine vs. terrestrial, to oxygen consumption in an emerging hypoxic zone in the lower Pearl River Estuary (PRE), a large eutrophic estuary located in Southern China. Our cruise, conducted in July 2014, consisted of two legs before and after the passing of Typhoon Rammasun...

We assess the relative contributions of differently sourced organic matter, marine vs. terrestrial, to oxygen consumption in an emerging hypoxic zone in the lower Pearl River Estuary (PRE), a large eutrophic estuary located in Southern China. Our cruise, conducted in July 2014, contained two legs before and after a passing through of Typhoon Rammas...

In many places on earth, the written record of coastal flooding events from tropical cyclones (typhoons, hurricanes) and tsunamis is too short or inconsistent to accurately assess the hazard posed by both kinds of event on scales beyond those of the average human lifespan. In this paper we summarize an integrated research paradigm that incorporates...

In many places in Asia, the written record of typhoons (tropical cyclones) and tsunamis is too short or inconsistent to accurately assess the risk of coastal disasters from both kinds of event. Here we propose that sedimentary deposits left by overwash events attributed to past typhoons or tsunamis can be used to extend the record of overwash, and...

The Dongge Cave speleothem δ18O record, which lies in the Pearl River basin (China), has been interpreted as recording a regional decline in Asian Summer Monsoon precipitation over the last 6.5 ka. The same overall trend is seen in the bulk sedimentary organic δ13Corg record from a core in the Pearl River Estuary. However, the two records differ in...

Typhoon Hagupit was one of six tropical cyclones that affected Hong Kong in 2008. When the typhoon made landfall, the combined effect of the waves, storm surge and seasonal high tides resulted in a maximum sea level of 3.53 m at the nearest tide gauge to the study site, the highest since 1962. The event caused considerable damage to coastal infrast...

Many countries have developed their own typhoon database for the use in understanding historical typhoon. However, when each database is compared, inconsistencies are evident in terms of the depth of information provided. This paper outlines the development of a combined database and provides comprehensive details of typhoons impacting the southeas...

Many countries have developed their own typhoon database for the use in understanding historical typhoon activity. However, when each database is compared, inconsistencies are evident in terms of the depth of information provided. This paper outlines the development of a combined database and provides comprehensive details of typhoons impacting the...

Understanding the mid-Holocene dynamics of the East Asian monsoon (EAM) is integral to improving models of the Holocene development of the global climate system. Here we reconstruct the mid-Holocene EAM history from the Pearl River estuary, southern China, using bulk organic carbon isotopes (δ13C), total carbon to total nitrogen (C/N) ratios and to...

The early Holocene history of the Pearl River delta is reconstructed based on a series of sediment cores obtained from one of the main palaeo-valleys in the basin. Sedimentary and microfossil diatom analyses combined with radiocarbon dating provide new evidence for the interactions between sea-level rise, antecedent topography and sedimentary disch...

The coastlines of the northern margin of the South China Sea include Taiwan, the Chinese provinces of Hainan, Guangdong, Fujian, Zhejiang and the special administrative regions of Hong Kong and Macau. These coastlines experience significant seasonal typhoon activity. Although many databases have been developed for typhoon research purposes when com...

This research reconstructed the Late Quaternary salinity history of the Pearl River estuary, China, from diatom records of four sedimentary cores. The reconstruction was produced through the application of a diatom–salinity transfer function developed based on 77 modern surface sediment samples collected across the estuary from shallow marine envir...

This study examines the sedimentary evidence of human activities during the last 4000 years in the Pearl River deltaic area. The analyses are focused on indentifying agricultural signatures present in the sedimentary record and establishing the timing of a change from a simple, rice-based agriculture to a more advanced, diverse agriculture. The exa...

Preservation of organic matter in estuarine and coastal areas is an important process in the global carbon cycle. This paper presents bulk δ13C and C/N of organic matter from source to sink in the Pearl River catchment, delta and estuary, and discusses the applicability of δ13C and C/N as indicators for sources of organic matter in deltaic and estu...

The East Asian Monsoon (EAM) is one of the most significant contributors, both environmentally and socioeconomically, to the densely-populated East Asia region in which over one third of the world's population reside. Additionally, the EAM is a key system in global atmospheric circulation. Thus, understanding past changes in the EAM is of pivotal i...

This study presents findings concerning Late Quaternary environmental changes in the Pearl River mouth region, China based on the study of over 300 boreholes. Out of these, 35 boreholes are selected for the reconstruction of transects across the deltaic plain and estuary. 39 radiocarbon dates obtained from these boreholes are used to help define th...

This Holocene evolutionary history of the Pearl River delta has been reconstructed using borehole data and cultural records. An evolutionary model spanning the last 9000 years was constructed and demonstrates the land-sea interaction in a large deltaic complex which formed under the influence of Asian monsoon climate. Specifically, this research ex...

This paper examines the characteristics of historical floods and associated monsoon precipitation in the Yangtze Catchment, with specific attention given to the middle and lower Yangtze basin. Based on in situ field observations and historical discharge, flood duration, and land-use information, etc, we propose a number of flood characteristics of...

This paper reconstructs the evolutionary history of the Pearl River delta over the last 9000 years and investigates land—sea interaction in a large deltaic complex which formed under the influence of Asian monsoon climate. Specifically, this research examines the delta evolution in the context of three driving mechanisms: (1) rising sea level that...

This study aims to examine the applicability of organic carbon isotopes as a palaeo-monsoon proxy for summer monsoon freshwater discharge, using a case study in the Pearl River estuary, China. This research is based on the assumption that different sources of organic carbon possess different isotopic signatures and these differences are bigger than...

This study examines the characteristics of sediment rating parameters recorded at various gauging stations in the Yangtze Basin in relation to their controls. Our findings indicate that the parameters are associated with river channel morphology of the selected reaches. High b-values (> 1.600) and low log(a) values (< − 4.000) occur in the upper co...

Understanding the mid-Holocene dynamics of the East Asian monsoon (EAM) is integral to modelling the Holocene development of the global climate system (Webster et al., 1998). Thus the mid-Holocene EAM history was reconstructed using bulk organic carbon isotopes (delta13C), total carbon to total nitrogen (C/N) ratios and total organic carbon (TOC) f...