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As the sophistication of GCMs has increased , the role of the land surface component has become more and more important . Drip irrigation , which minimizes foliar wetness , is recommended for gardeners who have this problem . However , in a year with excessive rain or if planted on a less than ideal site , peonies may suffer from disease . Further , truly global coverage is unlikely , even with a space mission , because of orbital limitations and the requirement for two cloud-free scenes with compatible imaging geometry . However , in a home garden situation , the observant gardener can keep this problem from getting out of hand .