IGMETS Analysis Overview
The IGMETS analysis methods are a compilation of concepts and ideas used-in, discussed-by, or dreamed-of during 15+ years of time series work with an assortment of ICES and SCOR time series analysis working groups. Many of these concepts were impossible even five years ago, because of lack of data and/or analysis tools. The IGMETS analysis, at the very minimum, will be a global coverage, expanded-variable-set expansion of the general analyses done in the North Atlantic by the ICES Working Groups on Zooplankton Ecology (WGZE) and Phytoplankton and Microbial Ecology (WGPME). Examples of these groups' work can be found in the ICES Zooplankton Status Report [click here] and the ICES Phytoplankton and Microbial Plankton Status Report [click here].
While the earlier WGZE and WGPME analyses have focused only on annual changes from year-to-year, recent work by these groups have found that a monthly analysis provides an additional layer of detail as to what and how changes are occuring within a site or region. For example, an interannual increasing trend in a variable (e.g., water temperature or chlorophyll concentrations) may be due to an especially strong spring (March/April) increases the annual total even though the other individual months show little or no increase by themselves. IGMETS will be working in collaboration with these ICES working groups as well as with SCOR WG137.
The actual analysis applied to each individual data set will depend on the temporal and spatial coverage of each data set and variable. A 30 year "summer only" time series may not be able to participate in a twelve-month analysis, but it can participate in summer-only analysis. The overall analysis will focus on individual variables (e.g., "total zooplankton biomass") as well as multi-variable analysis (e.g., "nutrient ratios and diatom ratios").
As the IGMETS works progresses, participants will be given access to a password-protected section of this website that will allow them to preview initial and ongoing analysis results. (This password protection is to protect these results during development and prior to publication of the final report.)