Daily Archives: January 25, 2011

Comparison of 2011-11 El Nino – La Nina Cycle with Previous Cycles

Here is a quick update on how the 2010-2011 El Nino – La Nina cycle compares with several previous cycles.  Click to Enlarge

The 2010-2011 cycle seems to be following a similar path to the 4 previous cycles shown in the chart. The 1973, 1983 and 1998 El Ninos had higher SSTAs than the current 2010 cycle. The current La Nina is close to the La Nina lows in 1998-99 and 1973-74. The 1973 and current cycles have followed a similar path so far.

It looks like the current La Nina conditions may be near the bottom.  We may see Nino 34 SSTA’s start to rise in the next few months.


Climate Time Series In a Single CSV File: Update 1

I am pleased to announce my CTS.csv file which includes 18 climate monthly time series in one easy to access csv file. This is part of  my goal of having a user friendly way for do-it-yourself citizen climate scientists to get up-to-date agency climate time series in a painless way.

Update 1: Reader Scott asked if I could provide meta data for the columns in my CTS.csv. This page lists the source agency and data links for the climate data series.

Here’s a snap shot of the first 6 rows of my  CTS.csv file. The data extends from 1880 until the most recent month.  Click image to enlarge

My hope is to make the CTS.csv the go-to file for citizen climate scientists who may want to:

  • Check temperature anomalies trends by series (GISS, HAD, NOAA, RSS, UAH)
  • Assess climate oscillations(AMO, AO, MEI, Nino34,  PDO)  trends
  • Evaluate  CO2 versus temperature anomaly relationships
  • Evaluate relationship between Sunspot numbers and anomaly temperature anomaly trends
  • Compare atmospheric transmission, SATO index  and volcanic activity
  • Assess impact of volcanoes on temperature anomaly trends
  • Compare MEI versus Nino ENSO 34 indicators
  • Assess lower stratospheric trends using RSS’s TLS series

By having these climate time series in a single csv file, R and Excel users can work with up to date data in a convenient form. The file will be automatically updated monthly as the climate agencies release their latest data.

How can CTS.csv Help Do-It-Yourself Citizen Climate Scientists?

Interested climate observers who want to compare global SSTA versus Nino34 trends, for example, have to follow a multiphase process:

  1. Find data file – even with Google this can take time
  2. Download files
  3. Merge 2 or more files to get data  into a usable format – source files all have different formats
  4. Perform analysis

Steps 1-3 can be very time consuming, so many users don’t bother checking out their ideas. Rather, they may rely on climate blog  comments. With CTS.csv and some R or Excel analysis, they can find the facts themselves rather than just having opinions.  They can submit their analysis and charts to blog posts, hopefully increasing the rigor of blog discussions.

Climate bloggers can request that their readers submit charts to back up their climate trend claims.

Data & RClimate Scripts Are All Open Book

All of the RClimate script that I use to produce the CTS.csv is available on-line at this link. Source data links are included in the function for each series.