Dataset for atmospheric transport of nutrients during a harmful algal bloom

The data presented in this article are related to the research article entitled “Atmospheric transport of nutrient matter during a harmful algal bloom”[1]. These data provide the concentration of nutrients (nitrate, ammonium and FeⅡ) in the atmosphere and their deposited flux in the East China Sea prior to the harmful algal bloom on May 3–8, 2006. They can be helpful for analyzing the source of nutrients causing the harmful algal blooms.


Description of data collection
• The large-scale harmful algal bloom events were collected from the Marine Environmental Quality Bulletin of China (http://www.coi.gov.cn/hygb) • Global Nested Air Quality Prediction Modeling System [2][3][4] were used to simulate the atmospheric transport and deposition flux of nutrient. Parameters for data collection • The harmful algal bloom event with an area larger than 10 0 0km 2

Value of the Data
• The data could be used to assess the contribution of the atmospheric nutrients to algal blooms • The data can be used to identify areas of elevated nutrient concentrations and deposition flux in the East China Sea. • The data can be used as a reference for predicting harmful algal bloom.

Data description
The harmful algal bloom event developed between May 3 and 8, 2006 was the first bloom with a spatial coverage of 10 0 0 km 2 that year. The considerable nutrient matter (nitrate, ammonium, ferrous iron) were transported to the algal bloom area via the atmosphere before occurring the harmful algal bloom. Figs. 1-3 show the Atmospheric transport of nitrate, ammonium and Fe Ⅱ , respectively. Fig. 4 shows the deposition flux of nutrients.

Experimental design, materials and methods
There were 6 harmful algal bloom events which were larger than 10 0 0 km 2 in East China Sea during 2006. The first harmful algal bloom with a spatial coverage of 10 0 0 km 2 developed on May 3-8, 2006. April and May are the transition time between winter and summer in the Northern Hemisphere. The atmospheric circulation patterns and oceanic currents in East China Sea were shifting from winter patterns to summer patterns during this period. In consideration of the seasonal change and time when the first harmful algla bloom with a spatial coverage of 10 0 0km 2 , we used the Global Nested Air Quality Prediction Modeling System (GNAQPMS) to calculate the atmospherically transported nutrients (nitrate, ammonium and Fe Ⅱ ) and their deposition flux by setting the simulation time from April 15 to May 6, 2006.
The GNAQPMS was independently developed by Institute of Atmospheric Physics, Chinese Academy of Sciences (IAP/CAS) [5] . The GNAQPMS model and its running schedule were provided by IAP/CAS [2] . A summary is presented here: The GNAQPMS utilized in this study is a fully modularized three-dimensional regional Eulerian chemical transport model, driven by the meteorological model the Weather Research and Forecasting (WRF) model. GNAQPMS reproduces the physical and chemical evolution of reactive pollutants by solving the mass balance equation in terrain-following coordinates [ 5 , 7-9 ]. It includes advection, diffusion and convection processes, gas/aqueous/aerosol chemistry, and parameterization of dry/wet deposition. GNAQPMS is composed of input, physic-chemical process and output: Input. The input items are the meteorological fields and emission inputs. The output of the WRF model was used for the meteorological fields. The meteorological data on April 15, 2006, as  the initial meteorological fields inputted to the WRF model, comes from http://rda.ucar.edu. The emission inputs consist of anthropogenic inputs (aerosol and trace gas) and natural emissions (vegetation, soil, volcano and lighting). In this study, we used the Fifth Assessment Report of the United Nations Intergovernmental Panel on Climate Change as anthropogenic input (1850-20 0 0 decade, 0.5 °× 0.5 °), Global Emissions Inventory Activity and Model of Emissions of Gases and Aerosols from Nature as biological input (20 0 0 decade, 0.5 °× 0.5 °). Regional Emission inventory in Asia as soil NOx input (year of 2001, 1 °× 1 °) and Global Emissions Inventory Activity as lighting NOx input (average value from 1983-1990, 1 °× 1 °) [6].
Physic-chemical process. The physical-chemical process included gas/aqueous/ heterogeneous/aerosol chemistry, advection, diffusion and convection processes, and modules for dry and wet deposition, and dust and sea salt dynamic emissions reactions and processes [ 4 , 6 , 9 ].
Output. The output items included the wet and dry deposition and spatial distribution of chemical species [6] .
The GNAQPMS had been modified on the basis of the topography and pollution pattern of East Asia. It has been widely applied to simulate the transport of air pollutants and to provide operational air quality forecasts in East Asia [ 3 , 4 , 7-15 ]

Declaration of Competing Interest
The authors declare that we have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.