Search found 17 matches

by dinesh_5497
Wed Jan 28, 2026 11:55 pm America/New_York
Forum: Home
Question: Merra2
Replies: 6

Re: Merra2

S.No database_name database_id field_id field_name 1 M2T1NXADG tavg1_2d_adg_Nx SSSV001 Seasalt_Convective_Scavenging_bin1 2 M2T1NXADG tavg1_2d_adg_Nx SSSV002 Seasalt_Convective_Scavenging_bin2 3 M2T1NXADG tavg1_2d_adg_Nx SSSV003 Seasalt_Convective_Scavenging_bin3 4 M2T1NXADG tavg1_2d_adg_Nx SSSV004 ...
by dinesh_5497
Wed Jan 28, 2026 12:40 am America/New_York
Forum: Home
Question: Merra2
Replies: 6

Re: Merra2

# -*- coding: utf-8 -*- """ Created on Fri Aug 16 12:39:57 2024 @author: DEASV """ import os import re import numpy as np import pandas as pd import xarray as xr from calendar import monthrange from opendap_download.multi_processing_download import DownloadManager impor...
by dinesh_5497
Tue Jan 27, 2026 6:50 am America/New_York
Forum: Home
Question: Merra2
Replies: 6

Merra2

I used to download Merra2 data using from merra scraping script, it fetches from opendap, recently i am getting 32kb netcdf file which is a error file, earlier i used to get the 18kb which has data. What might be the possible cause, is there any changes with authentication, login, change in format h...
by dinesh_5497
Fri Apr 05, 2024 12:27 pm America/New_York
Forum: Home
Question: unit conversion of MERRA2 variabless
Replies: 2

unit conversion of MERRA2 variabless

I need to use Sea Salt Surface Mass Concentration (SSSMASS). it is with unit of kg m-3, i need it in the format of kg/m3day
For that should i just multiply by 24 or divide by 24?
by dinesh_5497
Wed Mar 13, 2024 12:14 am America/New_York
Forum: Home
Question: PM 2.5 unit conversion from kg/m3 to kg/m2
Replies: 4

Re: PM 2.5 unit conversion from kg/m3 to kg/m2

Based on your answer, i need to download HLML from tavg1_2d_flx_Nx (M2T1NXFLX) and multiply with the SSSMASS.
by dinesh_5497
Sat Mar 09, 2024 10:55 am America/New_York
Forum: Home
Question: PM 2.5 unit conversion from kg/m3 to kg/m2
Replies: 4

PM 2.5 unit conversion from kg/m3 to kg/m2

I have data from merra 2 for sea salt mass concentration, the unit is kg/m3 , i need it in kg/m2 for my application. I like value for length scale which needs to multipled to it. How to find a length scale for specific location.
by dinesh_5497
Sat Dec 09, 2023 1:40 pm America/New_York
Forum: Home
Question: Merra2
Replies: 4

Re: Merra2

Thanks for answering I didn't understand it. I searched in google and i got this (https://developers.google.com/earth-engine/datasets/catalog/NASA_GSFC_MERRA_flx_2) Here they have mentioned 60 m as HLML. From the Merra2 File specification(https://gmao.gsfc.nasa.gov/pubs/docs/Bosilovich785.pdf) I am ...
by dinesh_5497
Thu Dec 07, 2023 3:09 pm America/New_York
Forum: Home
Question: Merra2
Replies: 4

Merra2

Hi I am not a chemistry expert, i need your support on unit conversion. Sea Salt Surface Mass Concentration - PM 2.5 is in Kg/m3 (Volumetric method), i need to convert into mg/m2 (Deposition method). For Example if i get 9.95 * 10^-9 kg/m3 as Sea Salt Surface Mass Concentration, what is the value in...
by dinesh_5497
Thu Dec 07, 2023 12:58 pm America/New_York
Forum: Home
Question: Merra2
Replies: 2

Merra2

I like to download some data from Merra2, i found a script from github to download data(https://github.com/emilylaiken/merradownload) also found Giovanni.
Which is better Giovanni or the script, what is the difference between the two.
by dinesh_5497
Thu Dec 07, 2023 11:04 am America/New_York
Forum: Home
Question: Corrosion
Replies: 7

Re: Corrosion

mikeb610.1 wrote: > Hi, > > If the question is, can the bins be added together, for SO2, the bins for > SU should not be added. SO2 is SU tracer #2, so the total deposition would > be SUWT002+SUSV002+SUSD002+SUDP002, with the units of kg/m^2/s properly > converted to mg/m^2/day > > For Cl, that woul...