The WP4 of the JERICO-Next is a synthesis of the project built upon activities in other WPs, gathering the consortium around applied Joint Research Activity Projects (JRAPs) selected to put forward the added value of JERICO-NEXT. In order to reach this objective, WP4 keeps on track the JERICO-NEXT course of actions via synthesis and application activities based on interactions with other WPs. WP4 helps establishing some topical approaches for the scientific strategy in WP1 (task 1.2) and will give inputs to establish the network strategy after JERICO-NEXT (task 1.6). Indeed, six JRAPs are being implemented to address different key environmental questions and/or policy requirements such as those considered by the MSFD, and according to the 6 JERICO scientific areas: 1- JRAP-1 on pelagic biodiversity 2- JRAP-2 on benthic biodiversity 3- JRAP-3 on chemical contaminant occurrence and related biological responses 4- JRAP-4 on hydrography and transport 5- JRAP-5 on carbon fluxes and carbonates system 6- JRAP-6 on operational oceanography. This document reports the work led in the framework of the JRAP activities during the 2nd year of the project whereas the deliverable D4.2 reports the activities led the 1st year. In the following pages, for each JRAP, we report main achievements with comparison to the initial plan, the next steps, the acquired data (link with WP5), and acquired communication material (to feed WP8).