In the past years, massive Earth observation products have been produced in international and national projects, with a focus on the synergy of in-situ and space-borne data normally. This development accelerates access to large data streams freely. This makes the information service for the cold regions feasible, even operationally to some extent. The recently created databases about the cold regions and the open access to standard data products provide both the tools and historical data required for the full fruition of information services and the consolidation of the data value chain.
The data products and information produced by advanced algorithms running on the high-performance computer system have been built for more than 5 years, for example, the setup of the International Research Center of Big Data for Sustainable Development Goals (CBAS), which is affiliated by three engineering division on the data, and information producing functions. Another good tool is the online computing capacity formed by Google Earth Engine (GEE), by which several data products have been produced. Other methods and data sources are (1) multi-resources data stream by the combination of public and private data, employing the open resource Earth observations data, like Landsat, Gaofen serious, Sentinel, AMSR and MODIS, Fengyun series, and SDGSAT-1, and tools are online processing by GEE and self-developed algorithms. (2) Tools and open knowledge of the data processing tools. The method includes the physical retrieval algorithm, standard data post-processing to make the data operational and updated periodically, including snow cover, e.g., NDSI and post-process for cloud-free datasets tools, Sea Ice Concentration by ASI, NT algorithm, Sea Ice Melting ponds by MODIS algorithm (physical model), lake and river ice coverage and phenology by threshold method automatically, and etc,
As for the developed and in-development method, the continuous data stream will be operated by dedicated units that link with GEOCRI contributors, while for the planned data products, this will be continually developed by the existing projects (see below on the resource), while new group work needs to be initiated to engage new player through the open policy on the data products. At this stage, the metadata of an online database about the global cold regions has been set up, see http://115.29.142.79/group/inventury-of-database-for-earth-three-poles, the published dataset (high-level products) and open policies are the main challenges for the service, which will be discussed and developed by this initiative.
Open science is leading the way forward to create data services consistent with the new stage of the development of the EOs market, this development deserves high priority in cold regions, where data are sparse and difficult to obtain by local communities. Space-based products effectively bridge multiple information gaps.
The United Nations push the digital commons to promote the digital benefits of climate actions addressing sustainable development goals. The digital services are at the end of the data stream into sustainable practices, with traditional agencies calling for the data to be applicable and cost-free, for instance, monitoring shipping lanes to adapt to new challenges. Both the emerging policy mandate and the needs of private actors call for the provision of information services to the cold regions.